计算矩阵的秩和解及其解情况的SWT代码
这里我使用的是Jama-1.0.2.jar矩阵计算的包；
关于这个包前面的文章有介绍：
http://www.blogjava.net/lusm/archive/2007/07/07/128767.html
界面：
package
com.lusm;
import
org.eclipse.swt.SWT;
import
org.eclipse.swt.custom.CLabel;
import
org.eclipse.swt.custom.StyledText;
import
org.eclipse.swt.events.SelectionAdapter;
import
org.eclipse.swt.events.SelectionEvent;
import
org.eclipse.swt.widgets.Button;
import
org.eclipse.swt.widgets.Display;
import
org.eclipse.swt.widgets.Shell;
import
com.swtdesigner.SWTResourceManager;
import
org.eclipse.swt.widgets.MessageBox;
/**/
/*
* 主程序 * 
* */
public
class
MatTest
{ private static StyledText r4; private static StyledText r3; private static StyledText r2; private static StyledText r1; private static StyledText m4; private static StyledText m3; private static StyledText m2; private static StyledText m1; private static StyledText z4; private static StyledText z3; private static StyledText z2; private static StyledText z1; private static StyledText y4; private static StyledText y3; private static StyledText y2; private static StyledText y1; private static StyledText x4; private static StyledText x3; private static StyledText x2; private static StyledText x1; 
public static void main(String[] args) { final Display display = Display.getDefault(); final Shell shell = new Shell(); shell.setImage(SWTResourceManager.getImage(MatTest.class, "/com/sun/java/swing/plaf/windows/icons/JavaCup32.png")); shell.setForeground(SWTResourceManager.getColor(255, 255, 255)); shell.setSize(428, 393); shell.setText("4元一次方程"); // shell.open(); final CLabel label = new CLabel(shell, SWT.NONE); label.setText("运行结果：该方程组对应矩阵的秩为："); label.setBounds(10, 194, 210, 19); final CLabel xLabel = new CLabel(shell, SWT.NONE); xLabel.setText("X="); xLabel.setBounds(64, 219, 20, 19); final CLabel rs1 = new CLabel(shell, SWT.NONE); rs1.setBounds(115, 219, 269, 19); final CLabel xLabel_1 = new CLabel(shell, SWT.NONE); xLabel_1.setBounds(64, 244, 20, 19); xLabel_1.setText("Y="); final CLabel rs2 = new CLabel(shell, SWT.NONE); rs2.setBounds(115, 244, 269, 19); final CLabel xLabel_2 = new CLabel(shell, SWT.NONE); xLabel_2.setBounds(64, 269, 20, 19); xLabel_2.setText("Z="); final CLabel rs3 = new CLabel(shell, SWT.NONE); rs3.setBounds(115, 269, 269, 19); final CLabel xLabel_3 = new CLabel(shell, SWT.NONE); xLabel_3.setBounds(64, 294, 20, 19); xLabel_3.setText("M="); final CLabel rs4 = new CLabel(shell, SWT.NONE); rs4.setBounds(115, 294, 269, 19); x1 = new StyledText(shell, SWT.BORDER); x1.setBackground(SWTResourceManager.getColor(241, 225, 216)); x1.setBounds(10, 10, 48, 19); x2 = new StyledText(shell, SWT.BORDER); x2.setBackground(SWTResourceManager.getColor(241, 225, 216)); x2.setBounds(10, 55, 48, 19); x3 = new StyledText(shell, SWT.BORDER); x3.setBackground(SWTResourceManager.getColor(241, 225, 216)); x3.setBounds(10, 101, 48, 19); x4 = new StyledText(shell, SWT.BORDER); x4.setBackground(SWTResourceManager.getColor(241, 225, 216)); x4.setBounds(10, 151, 48, 19); y1 = new StyledText(shell, SWT.BORDER); y1.setBackground(SWTResourceManager.getColor(241, 225, 216)); y1.setBounds(92, 10, 48, 19); y2 = new StyledText(shell, SWT.BORDER); y2.setBackground(SWTResourceManager.getColor(241, 225, 216)); y2.setBounds(92, 55, 48, 19); y3 = new StyledText(shell, SWT.BORDER); y3.setBackground(SWTResourceManager.getColor(241, 225, 216)); y3.setBounds(92, 101, 48, 19); y4 = new StyledText(shell, SWT.BORDER); y4.setBackground(SWTResourceManager.getColor(241, 225, 216)); y4.setBounds(92, 151, 48, 19); z1 = new StyledText(shell, SWT.BORDER); z1.setBackground(SWTResourceManager.getColor(241, 225, 216)); z1.setBounds(183, 10, 48, 19); z2 = new StyledText(shell, SWT.BORDER); z2.setBackground(SWTResourceManager.getColor(241, 225, 216)); z2.setBounds(183, 55, 48, 19); z3 = new StyledText(shell, SWT.BORDER); z3.setBackground(SWTResourceManager.getColor(241, 225, 216)); z3.setBounds(183, 101, 48, 19); z4 = new StyledText(shell, SWT.BORDER); z4.setBackground(SWTResourceManager.getColor(241, 225, 216)); z4.setBounds(183, 151, 48, 19); m1 = new StyledText(shell, SWT.BORDER); m1.setBackground(SWTResourceManager.getColor(241, 225, 216)); m1.setBounds(274, 10, 48, 19); m2 = new StyledText(shell, SWT.BORDER); m2.setBackground(SWTResourceManager.getColor(241, 225, 216)); m2.setBounds(274, 55, 48, 19); m3 = new StyledText(shell, SWT.BORDER); m3.setBackground(SWTResourceManager.getColor(241, 225, 216)); m3.setBounds(274, 101, 48, 19); m4 = new StyledText(shell, SWT.BORDER); m4.setBackground(SWTResourceManager.getColor(241, 225, 216)); m4.setBounds(274, 151, 48, 19); r1 = new StyledText(shell, SWT.BORDER); r1.setBackground(SWTResourceManager.getColor(241, 225, 216)); r1.setBounds(362, 10, 48, 19); r2 = new StyledText(shell, SWT.BORDER); r2.setBackground(SWTResourceManager.getColor(241, 225, 216)); r2.setBounds(362, 55, 48, 19); r3 = new StyledText(shell, SWT.BORDER); r3.setBackground(SWTResourceManager.getColor(241, 225, 216)); r3.setBounds(362, 101, 48, 19); r4 = new StyledText(shell, SWT.BORDER); r4.setBackground(SWTResourceManager.getColor(241, 225, 216)); r4.setBounds(362, 151, 48, 19); final CLabel mLabel = new CLabel(shell, SWT.NONE); mLabel.setText("M ="); mLabel.setBounds(328, 10, 40, 19); final CLabel mLabel_1 = new CLabel(shell, SWT.NONE); mLabel_1.setBounds(328, 55, 40, 19); mLabel_1.setText("M ="); final CLabel mLabel_2 = new CLabel(shell, SWT.NONE); mLabel_2.setBounds(328, 101, 40, 19); mLabel_2.setText("M ="); final CLabel mLabel_3 = new CLabel(shell, SWT.NONE); mLabel_3.setBounds(328, 151, 40, 19); mLabel_3.setText("M ="); final CLabel mLabel_4 = new CLabel(shell, SWT.NONE); mLabel_4.setBounds(237, 10, 31, 19); mLabel_4.setText("Z +"); final CLabel mLabel_1_1 = new CLabel(shell, SWT.NONE); mLabel_1_1.setBounds(237, 55, 31, 19); mLabel_1_1.setText("Z +"); final CLabel mLabel_2_1 = new CLabel(shell, SWT.NONE); mLabel_2_1.setBounds(237, 101, 31, 19); mLabel_2_1.setText("Z +"); final CLabel mLabel_3_1 = new CLabel(shell, SWT.NONE); mLabel_3_1.setBounds(237, 151, 31, 19); mLabel_3_1.setText("Z +"); final CLabel mLabel_4_1 = new CLabel(shell, SWT.NONE); mLabel_4_1.setBounds(146, 10, 31, 19); mLabel_4_1.setText("Y +"); final CLabel mLabel_1_1_1 = new CLabel(shell, SWT.NONE); mLabel_1_1_1.setBounds(146, 55, 31, 19); mLabel_1_1_1.setText("Y +"); final CLabel mLabel_2_1_1 = new CLabel(shell, SWT.NONE); mLabel_2_1_1.setBounds(146, 101, 31, 19); mLabel_2_1_1.setText("Y +"); final CLabel mLabel_3_1_1 = new CLabel(shell, SWT.NONE); mLabel_3_1_1.setBounds(146, 151, 31, 19); mLabel_3_1_1.setText("Y +"); final CLabel mLabel_4_2 = new CLabel(shell, SWT.NONE); mLabel_4_2.setBounds(64, 10, 31, 19); mLabel_4_2.setText("X +"); final CLabel mLabel_1_1_2 = new CLabel(shell, SWT.NONE); mLabel_1_1_2.setBounds(64, 55, 31, 19); mLabel_1_1_2.setText("X +"); final CLabel mLabel_2_1_2 = new CLabel(shell, SWT.NONE); mLabel_2_1_2.setBounds(64, 101, 31, 19); mLabel_2_1_2.setText("X +"); final CLabel mLabel_3_1_2 = new CLabel(shell, SWT.NONE); mLabel_3_1_2.setBounds(64, 151, 31, 19); mLabel_3_1_2.setText("X +"); final CLabel ifsure = new CLabel(shell, SWT.NONE); ifsure.setBounds(347, 194, 60, 19); final CLabel label_1 = new CLabel(shell, SWT.NONE); label_1.setBounds(265, 194, 78, 19); label_1.setText("解的情况为："); final CLabel rank = new CLabel(shell, SWT.NONE); rank.setBounds(226, 194, 34, 19); final Button done = new Button(shell, SWT.NONE); done.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { //这样节省资源 String[][] str={{x1.getText(),y1.getText(),z1.getText(),m1.getText(),r1.getText()}, {x2.getText(),y2.getText(),z2.getText(),m2.getText(),r2.getText()}, {x3.getText(),y3.getText(),z3.getText(),m3.getText(),r3.getText()}, {x4.getText(),y4.getText(),z4.getText(),m4.getText(),r4.getText()}}; TestDo testdo=new TestDo(); //获取当前的数据 testdo.getstr(str); if(!testdo.checkall()){ MessageBox mess=new MessageBox(shell,SWT.None); mess.setMessage("您输入的有问题！请在每个空格填上合理的值再点运算，谢谢合作！"); mess.open(); // System.out.println("checkall is "+testdo.checkall()); }else{ //数据转换 testdo.StrToDou(); //计算秩 ifsure.setText(testdo.ifsure()); String rank1=String.valueOf(testdo.getrank()); rank.setText(rank1); if(testdo.ifsure().equals("有唯一解")){ double[] dou=testdo.doneit(); rs1.setText(String.valueOf(dou[0])); rs2.setText(String.valueOf(dou[1])); rs3.setText(String.valueOf(dou[2])); rs4.setText(String.valueOf(dou[3]));
} } } }); done.setImage(SWTResourceManager.getImage(MatTest.class, "/org/eclipse/jface/dialogs/images/message_warning.gif")); done.setText("运算"); done.setBounds(224, 331, 60, 23); final Button none = new Button(shell, SWT.NONE); none.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { rs1.setText("");rs2.setText(""); rs3.setText("");rs4.setText(""); x1.setText("");y1.setText(""); z1.setText("");m1.setText(""); r1.setText("");x2.setText(""); y2.setText("");z2.setText(""); m2.setText("");r2.setText(""); x3.setText("");y3.setText(""); z3.setText("");m3.setText(""); x4.setText("");y4.setText(""); z4.setText("");m4.setText(""); rank.setText("");ifsure.setText(""); } }); none.setImage(SWTResourceManager.getImage(MatTest.class, "/org/eclipse/jface/dialogs/images/message_error.gif")); none.setText("取消"); none.setBounds(290, 331, 57, 23); final Button rxit = new Button(shell, SWT.NONE); rxit.setImage(SWTResourceManager.getImage(MatTest.class, "/org/eclipse/jface/dialogs/images/message_info.gif")); rxit.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { shell.close(); } }); rxit.setText("退出"); rxit.setBounds(353, 331, 57, 23); shell.layout(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } }}
package
com.swtdesigner;
import
java.io.BufferedInputStream;
import
java.io.FileInputStream;
import
java.io.InputStream;
import
java.util.HashMap;
import
java.util.Iterator;
import
org.eclipse.jface.resource.CompositeImageDescriptor;
import
org.eclipse.swt.SWT;
import
org.eclipse.swt.graphics.
*
;
import
org.eclipse.swt.widgets.
*
;
/** */
/** * Utility class for managing OS resources associated with SWT controls such as * colors, fonts, images, etc. * * !!! IMPORTANT !!! Application code must explicitly invoke the <code>dispose()</code> * method to release the operating system resources managed by cached objects * when those objects and OS resources are no longer needed (e.g. on * application shutdown) * * This class may be freely distributed as part of any application or plugin. * <p> * Copyright (c) 2003 - 2005, Instantiations, Inc. <br>All Rights Reserved * * @author scheglov_ke * @author Dan Rubel */
public
class
SWTResourceManager
{ /** *//** * Dispose of cached objects and their underlying OS resources. This should * only be called when the cached objects are no longer needed (e.g. on * application shutdown) */ public static void dispose() { disposeColors(); disposeFonts(); disposeImages(); disposeCursors(); } ////////////////////////////// // Color support ////////////////////////////// /** *//** * Maps RGB values to colors */ private static HashMap m_ColorMap = new HashMap(); /** *//** * Returns the system color matching the specific ID * @param systemColorID int The ID value for the color * @return Color The system color matching the specific ID */ public static Color getColor(int systemColorID) { Display display = Display.getCurrent(); return display.getSystemColor(systemColorID); } /** *//** * Returns a color given its red, green and blue component values * @param r int The red component of the color * @param g int The green component of the color * @param b int The blue component of the color * @return Color The color matching the given red, green and blue componet values */ public static Color getColor(int r, int g, int b) { return getColor(new RGB(r, g, b)); } /** *//** * Returns a color given its RGB value * @param rgb RGB The RGB value of the color * @return Color The color matching the RGB value */ public static Color getColor(RGB rgb) { Color color = (Color) m_ColorMap.get(rgb); if (color == null) { Display display = Display.getCurrent(); color = new Color(display, rgb); m_ColorMap.put(rgb, color); } return color; } /** *//** * Dispose of all the cached colors */ public static void disposeColors() { for (Iterator iter = m_ColorMap.values().iterator(); iter.hasNext();) ((Color) iter.next()).dispose(); m_ColorMap.clear(); } ////////////////////////////// // Image support ////////////////////////////// /** *//** * Maps image names to images */ private static HashMap m_ClassImageMap = new HashMap(); /** *//** * Maps images to image decorators */ private static HashMap m_ImageToDecoratorMap = new HashMap(); /** *//** * Returns an image encoded by the specified input stream * @param is InputStream The input stream encoding the image data * @return Image The image encoded by the specified input stream */ protected static Image getImage(InputStream is) { Display display = Display.getCurrent(); ImageData data = new ImageData(is); if (data.transparentPixel > 0) return new Image(display, data, data.getTransparencyMask()); return new Image(display, data); } /** *//** * Returns an image stored in the file at the specified path * @param path String The path to the image file * @return Image The image stored in the file at the specified path */ public static Image getImage(String path) { return getImage("default", path); //$NON-NLS-1$ } /** *//** * Returns an image stored in the file at the specified path * @param section The section to which belongs specified image * @param path String The path to the image file * @return Image The image stored in the file at the specified path */ public static Image getImage(String section, String path) { String key = section + '|' + SWTResourceManager.class.getName() + '|' + path; Image image = (Image) m_ClassImageMap.get(key); if (image == null) { try { FileInputStream fis = new FileInputStream(path); image = getImage(fis); m_ClassImageMap.put(key, image); fis.close(); } catch (Exception e) { image = getMissingImage(); m_ClassImageMap.put(key, image); } } return image; } /** *//** * Returns an image stored in the file at the specified path relative to the specified class * @param clazz Class The class relative to which to find the image * @param path String The path to the image file * @return Image The image stored in the file at the specified path */ public static Image getImage(Class clazz, String path) { String key = clazz.getName() + '|' + path; Image image = (Image) m_ClassImageMap.get(key); if (image == null) { try { if (path.length() > 0 && path.charAt(0) == '/') { String newPath = path.substring(1, path.length()); image = getImage(new BufferedInputStream(clazz.getClassLoader().getResourceAsStream(newPath))); } else { image = getImage(clazz.getResourceAsStream(path)); } m_ClassImageMap.put(key, image); } catch (Exception e) { image = getMissingImage(); m_ClassImageMap.put(key, image); } } return image; } private static final int MISSING_IMAGE_SIZE = 10; private static Image getMissingImage() { Image image = new Image(Display.getCurrent(), MISSING_IMAGE_SIZE, MISSING_IMAGE_SIZE); // GC gc = new GC(image); gc.setBackground(getColor(SWT.COLOR_RED)); gc.fillRectangle(0, 0, MISSING_IMAGE_SIZE, MISSING_IMAGE_SIZE); gc.dispose(); // return image; } /** *//** * Style constant for placing decorator image in top left corner of base image. */ public static final int TOP_LEFT = 1; /** *//** * Style constant for placing decorator image in top right corner of base image. */ public static final int TOP_RIGHT = 2; /** *//** * Style constant for placing decorator image in bottom left corner of base image. */ public static final int BOTTOM_LEFT = 3; /** *//** * Style constant for placing decorator image in bottom right corner of base image. */ public static final int BOTTOM_RIGHT = 4; /** *//** * Returns an image composed of a base image decorated by another image * @param baseImage Image The base image that should be decorated * @param decorator Image The image to decorate the base image * @return Image The resulting decorated image */ public static Image decorateImage(Image baseImage, Image decorator) { return decorateImage(baseImage, decorator, BOTTOM_RIGHT); } /** *//** * Returns an image composed of a base image decorated by another image * @param baseImage Image The base image that should be decorated * @param decorator Image The image to decorate the base image * @param corner The corner to place decorator image * @return Image The resulting decorated image */ public static Image decorateImage(final Image baseImage, final Image decorator, final int corner) { HashMap decoratedMap = (HashMap) m_ImageToDecoratorMap.get(baseImage); if (decoratedMap == null) { decoratedMap = new HashMap(); m_ImageToDecoratorMap.put(baseImage, decoratedMap); } Image result = (Image) decoratedMap.get(decorator); if (result == null) { final Rectangle bid = baseImage.getBounds(); final Rectangle did = decorator.getBounds(); final Point baseImageSize = new Point(bid.width, bid.height); CompositeImageDescriptor compositImageDesc = new CompositeImageDescriptor() { protected void drawCompositeImage(int width, int height) { drawImage(baseImage.getImageData(), 0, 0); if (corner == TOP_LEFT) { drawImage(decorator.getImageData(), 0, 0); } else if (corner == TOP_RIGHT) { drawImage(decorator.getImageData(), bid.width - did.width - 1, 0); } else if (corner == BOTTOM_LEFT) { drawImage(decorator.getImageData(), 0, bid.height - did.height - 1); } else if (corner == BOTTOM_RIGHT) { drawImage(decorator.getImageData(), bid.width - did.width - 1, bid.height - did.height - 1); } } protected Point getSize() { return baseImageSize; } }; result = compositImageDesc.createImage(); decoratedMap.put(decorator, result); } return result; } /** *//** * Dispose all of the cached images */ public static void disposeImages() { for (Iterator I = m_ClassImageMap.values().iterator(); I.hasNext();) ((Image) I.next()).dispose(); m_ClassImageMap.clear(); // for (Iterator I = m_ImageToDecoratorMap.values().iterator(); I.hasNext();) { HashMap decoratedMap = (HashMap) I.next(); for (Iterator J = decoratedMap.values().iterator(); J.hasNext();) { Image image = (Image) J.next(); image.dispose(); } } } /** *//** * Dispose cached images in specified section * @param section the section do dispose */ public static void disposeImages(String section) { for (Iterator I = m_ClassImageMap.keySet().iterator(); I.hasNext();) { String key = (String) I.next(); if (!key.startsWith(section + '|')) continue; Image image = (Image) m_ClassImageMap.get(key); image.dispose(); I.remove(); } } ////////////////////////////// // Font support ////////////////////////////// /** *//** * Maps font names to fonts */ private static HashMap m_FontMap = new HashMap(); /** *//** * Maps fonts to their bold versions */ private static HashMap m_FontToBoldFontMap = new HashMap(); /** *//** * Returns a font based on its name, height and style * @param name String The name of the font * @param height int The height of the font * @param style int The style of the font * @return Font The font matching the name, height and style */ public static Font getFont(String name, int height, int style) { return getFont(name, height, style, false, false); } /** *//** * Returns a font based on its name, height and style. * Windows-specific strikeout and underline flags are also supported. * @param name String The name of the font * @param size int The size of the font * @param style int The style of the font * @param strikeout boolean The strikeout flag (warning: Windows only) * @param underline boolean The underline flag (warning: Windows only) * @return Font The font matching the name, height, style, strikeout and underline */ public static Font getFont(String name, int size, int style, boolean strikeout, boolean underline) { String fontName = name + '|' + size + '|' + style + '|' + strikeout + '|' + underline; Font font = (Font) m_FontMap.get(fontName); if (font == null) { FontData fontData = new FontData(name, size, style); if (strikeout || underline) { try { Class logFontClass = Class.forName("org.eclipse.swt.internal.win32.LOGFONT"); //$NON-NLS-1$ Object logFont = FontData.class.getField("data").get(fontData); //$NON-NLS-1$ if (logFont != null && logFontClass != null) { if (strikeout) { logFontClass.getField("lfStrikeOut").set(logFont, new Byte((byte) 1)); //$NON-NLS-1$ } if (underline) { logFontClass.getField("lfUnderline").set(logFont, new Byte((byte) 1)); //$NON-NLS-1$ } } } catch (Throwable e) { System.err.println( "Unable to set underline or strikeout" + " (probably on a non-Windows platform). " + e); //$NON-NLS-1$ //$NON-NLS-2$ } } font = new Font(Display.getCurrent(), fontData); m_FontMap.put(fontName, font); } return font; } /** *//** * Return a bold version of the give font * @param baseFont Font The font for whoch a bold version is desired * @return Font The bold version of the give font */ public static Font getBoldFont(Font baseFont) { Font font = (Font) m_FontToBoldFontMap.get(baseFont); if (font == null) { FontData fontDatas[] = baseFont.getFontData(); FontData data = fontDatas[0]; font = new Font(Display.getCurrent(), data.getName(), data.getHeight(), SWT.BOLD); m_FontToBoldFontMap.put(baseFont, font); } return font; } /** *//** * Dispose all of the cached fonts */ public static void disposeFonts() { for (Iterator iter = m_FontMap.values().iterator(); iter.hasNext();) ((Font) iter.next()).dispose(); m_FontMap.clear(); } ////////////////////////////// // CoolBar support ////////////////////////////// /** *//** * Fix the layout of the specified CoolBar * @param bar CoolBar The CoolBar that shgoud be fixed */ public static void fixCoolBarSize(CoolBar bar) { CoolItem[] items = bar.getItems(); // ensure that each item has control (at least empty one) for (int i = 0; i < items.length; i++) { CoolItem item = items[i]; if (item.getControl() == null) item.setControl(new Canvas(bar, SWT.NONE) { public Point computeSize(int wHint, int hHint, boolean changed) { return new Point(20, 20); } }); } // compute size for each item for (int i = 0; i < items.length; i++) { CoolItem item = items[i]; Control control = item.getControl(); control.pack(); Point size = control.getSize(); item.setSize(item.computeSize(size.x, size.y)); } } ////////////////////////////// // Cursor support ////////////////////////////// /** *//** * Maps IDs to cursors */ private static HashMap m_IdToCursorMap = new HashMap(); /** *//** * Returns the system cursor matching the specific ID * @param id int The ID value for the cursor * @return Cursor The system cursor matching the specific ID */ public static Cursor getCursor(int id) { Integer key = new Integer(id); Cursor cursor = (Cursor) m_IdToCursorMap.get(key); if (cursor == null) { cursor = new Cursor(Display.getDefault(), id); m_IdToCursorMap.put(key, cursor); } return cursor; } /** *//** * Dispose all of the cached cursors */ public static void disposeCursors() { for (Iterator iter = m_IdToCursorMap.values().iterator(); iter.hasNext();) ((Cursor) iter.next()).dispose(); m_IdToCursorMap.clear(); }}
处理类：
import
java.util.regex.Matcher;
//
应用到的包
import
Jama.Matrix;
/**/
/* * 后台数据处理 * */
public
class
TestDo
{ //用来获取文本框中的内容 String[][] str; //增广矩阵 double[][] no=new double[4][5]; //左边四列的值 double[][] noo=new double[4][4]; //最右边一列的值 double[][] nooo=new double[4][4]; //判断输入的数据是否有效 boolean bool; //获取文本框里的值 public void getstr(String[][] str){ this.str=str; } //判断，返回给MatTest一个boolean值 public boolean checkall(){ for(int i=0;i<4;i++){ for(int j=0;j<5;j++){ if(str[i][j].equals("")){ bool=false; break; // System.out.println("It's null"); }else{ Pattern pattern = Pattern.compile("[0-9]*"); Matcher isNum = pattern.matcher(str[i][j]); if(isNum.matches()) { bool=true; } } } } return bool; } //这个是转换的函数将String[][]转换成double[][]数据集 public void StrToDou(){ try{ //获取增广矩阵 for(int i=0;i<4;i++){ for(int j=0;j<5;j++){ no[i][j]=Double.valueOf(str[i][j]).doubleValue(); System.out.print(no[i][j]+" "); } System.out.println(); } System.out.println(); //获取矩阵 for(int i=0;i<4;i++){ for(int j=0;j<4;j++){ noo[i][j]=Double.valueOf(str[i][j]).doubleValue(); System.out.print(noo[i][j]+" "); } System.out.println(); } System.out.println(); for(int j=0;j<4;j++){ nooo[j][0]=Double.valueOf(str[j][4]).doubleValue(); System.out.print(nooo[j][0]+" "); } }catch(Exception e){ //return false; System.out.println("StrToDou "+e); } } //计算知道矩阵是否有解 public String ifsure(){ Matrix mat=new Matrix(no); Matrix mat1=new Matrix(noo); String ifs=""; //System.out.println("增广矩阵的秩是： "+mat.rank()); //System.out.println(" 矩阵的秩是： "+mat1.rank()); if(mat.rank()==mat1.rank()&&mat.rank()==4){ ifs="有唯一解"; }else if(mat.rank()<4){ ifs="无穷解"; }else{ ifs="无解"; } return ifs; } //获取增广矩阵的秩 public int getrank(){ Matrix mat=new Matrix(no); int rank=mat.rank(); return rank; } //计算得到结果 public double[] doneit(){ //将double[][]型数据集合化成矩阵 Matrix mat=new Matrix(noo); //同上 Matrix mat2=new Matrix(nooo); double[] dou=new double[4]; Matrix rs=mat.solve(mat2);//解方程的函数 /**//*测试代码 System.out.println("结果是："); System.out.println(rs.getArray()[0][0]); System.out.println(rs.getArray()[1][0]); System.out.println(rs.getArray()[2][0]); System.out.println(rs.getArray()[3][0]); */ for(int i=0;i<4;i++){ //将解的值取出在一个double[]数据集合里，返回给MatTest dou[i]=rs.getArray()[i][0]; } return dou; } }
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