java记事本功能代码
近段时间周末一直在学java，前两天没事仿照Windows记事本自己写了个记事本。
把各部分功能贴上来，记录一下，以备自己以后使用。
控件
private void initComponents() {
jFileChooser1 = new javax.swing.JFileChooser();
jScrollPane1 = new javax.swing.JScrollPane();
jTextArea1 = new javax.swing.JTextArea(); //编辑区域
jMenuBar1 = new javax.swing.JMenuBar(); //菜单部分
jMenu1 = new javax.swing.JMenu();
jNewText = new javax.swing.JMenuItem();
jMenuItem1 = new javax.swing.JMenuItem();
jMenuItemSave = new javax.swing.JMenuItem();
jSeparator2 = new javax.swing.JSeparator();
jMenuItem3 = new javax.swing.JMenuItem();
jMenu2 = new javax.swing.JMenu();
cutTextMenu = new javax.swing.JMenuItem();
jMenuItem5 = new javax.swing.JMenuItem();
jMenuItem4 = new javax.swing.JMenuItem();
DeleteText = new javax.swing.JMenuItem();
jSeparator1 = new javax.swing.JSeparator();
selectAll = new javax.swing.JMenuItem();
research = new javax.swing.JMenuItem();
jMenu4 = new javax.swing.JMenu();
jMenuItem2 = new javax.swing.JMenuItem();
jChangeLine = new javax.swing.JCheckBoxMenuItem();
jMenu3 = new javax.swing.JMenu();
jMenuItem6 = new javax.swing.JMenuItem();
jMenuItem7 = new javax.swing.JMenuItem();
/**
* 设置自动换行
**/
private void jChangeLineMouseReleased(java.awt.event.MouseEvent evt) {
// TODO add your handling code here:
if (resuleChangeLine) {
jTextArea1.setLineWrap(true);
resuleChangeLine = false;
} else {
jTextArea1.setLineWrap(false);
resuleChangeLine = true;
}
}
/**
* 删除功能
* */
private void DeleteText_menu(java.awt.event.MouseEvent evt) {
// TODO add your handling code here:
if (jTextArea1.getSelectedText() == null) {
jTextArea1.setSelectionStart(jTextArea1.getCaretPosition() - 1);
jTextArea1.setSelectionEnd(jTextArea1.getCaretPosition());
}
jTextArea1.replaceSelection("");
}
/**
* 查找对话框
*/
private void researchMouseReleased(java.awt.event.MouseEvent evt) {
// TODO add your handling code here:
final research rese = new research(null, false);
rese.setModalityType(ModalityType.MODELESS);
rese.setFocusableWindowState(true);
rese.setVisible(true);
rese.jButton1.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(java.awt.event.MouseEvent evt) {
rese.jButton1MouseClicked(evt);
find(rese.getText(), rese.isCompareUpperLetter, findIndex,
rese.isUpResearch);
}
});
rese.jButton2.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(java.awt.event.MouseEvent evt) {
rese.jButton2MouseReleased(evt);
rese.setVisible(false);
findIndex = 0;
}
});
}
/**
* 查找 内容
* */
private void find(String str, boolean isCompareUpperLetter, int TextIndex,
boolean isUpResearch) {
boolean isfind = false;
String Text = jTextArea1.getText();// 全文
int length = str.length();
char[] TextChar = Text.toCharArray();
String Temp = "";
if (isUpResearch) {
for (int i = 0; i < findIndex - 1; i++) {
Temp = new String(TextChar, i, length);
if (isCompareUpperLetter) {// 区分大小写
String TempLower = Temp.toLowerCase();
String TempUpper = Temp.toUpperCase();
if (TempLower.equals(str)) {
setSelectText(i, i + length);
findIndex = i;
isfind = true;
break;
}
if (TempUpper.equals(str)) {
setSelectText(i, i + length);
findIndex = i;
isfind = true;
break;
}
}
if (Temp.equals(str)) {// 不区分大小写
setSelectText(i, i + str.length());
findIndex = i;
isfind = true;
break;
}
}
if (!isfind) // 没有找到
findIndex = 0;
} else {
for (int i = findIndex; i < Text.length() - str.length(); i++) {
Temp = new String(TextChar, i, length);
if (isCompareUpperLetter) {// 区分大小写
String TempLower = Temp.toLowerCase();
String TempUpper = Temp.toUpperCase();
if (TempLower.equals(str)) {
setSelectText(i, i + length);
findIndex = i + str.length();
isfind = true;
break;
}
if (TempUpper.equals(str)) {
setSelectText(i, i + length);
findIndex = i + str.length();
isfind = true;
break;
}
}
if (Temp.equals(str)) {// 不区分大小写
setSelectText(i, i + str.length());
findIndex = i + str.length();
isfind = true;
break;
}
}
if (!isfind) // 没有找到
findIndex = 0;
}
}
private void setSelectText(int start, int end) {
jTextArea1.setSelectionStart(start);
jTextArea1.setSelectionEnd(end);
}
/**
* 新建功能
* */
private void jNewTextMouseReleased(java.awt.event.MouseEvent evt) {
// TODO add your handling code here:
setText("");
this.setTitle("UnsaveText");
}
/**
* 选择字体
*/
private void jMenuItem2MouseClicked(java.awt.event.MouseEvent evt) {
// TODO add your handling code here:
FontsChooser fonts = new FontsChooser(null, true);
fonts.setVisible(true);
if (fonts.resule)
jTextArea1.setFont(fonts.getfont());
}
/**
* 删除字符操作
*/
private void DeleteTextMouseClicked(java.awt.event.MouseEvent evt) {
// TODO add your handling code here:
if (jTextArea1.getSelectedText().equalsIgnoreCase(""))
jTextArea1.replaceSelection("");
}
/**
* 对复制内容进行粘贴 *
*/
private void jMenuItem4MouseReleased(java.awt.event.MouseEvent evt) {
// TODO add your handling code here:
jTextArea1.paste();
}
/**
* 全选功能
*/
private void selectAllMouseReleased(java.awt.event.MouseEvent evt) {
// TODO add your handling code here:
jTextArea1.selectAll();
}
private void jMenuItem4MouseClicked(java.awt.event.MouseEvent evt) {
// TODO add your handling code here:
}
/**
* 对选中内容继续复制
*/
private void jMenuItem5MouseReleased(java.awt.event.MouseEvent evt) {
// TODO add your handling code here:
jTextArea1.copy();
}
/**
* 保存至.txt
* */
private void saveText() throws IOException {
savaDialogShow();
BufferedWriter bw = null;
String[] strTextSave = getText().split("\n");// 将字符串分成原文换行，进行保存
if(pathSaveAddress.charAt(pathSaveAddress.length()-4)!='.')
pathSaveAddress=pathSaveAddress+".txt";
bw = new BufferedWriter(new FileWriter(pathSaveAddress));
for (int i = 0; i < strTextSave.length; i++) {
bw.write(strTextSave[i]);
bw.newLine();
bw.flush();
}
}
/**
* 保存对话框
*/
private void savaDialogShow() {
jFileChooser2.setAcceptAllFileFilterUsed(false);
jFileChooser2.addChoosableFileFilter(new TextFileFilter("txt"));
int result = jFileChooser2.showSaveDialog(null);
if (result == JFileChooser.APPROVE_OPTION) {
pathSaveAddress = jFileChooser2.getSelectedFile().getAbsolutePath();
}
}
/**
* 读取目标文本
**/
private void openText() throws IOException {
openDialogShow();
if (!pathOpenAddress.equalsIgnoreCase("")) {// 判断地址不为空
BufferedReader fw = null;
String tempstr = "";
StringBuffer strArray = new StringBuffer("");
fw = new BufferedReader(new FileReader(pathOpenAddress));
while ((tempstr = fw.readLine()) != null) {// 从目标文件中读取字符
strArray.append(tempstr);
strArray.append('\r');
strArray.append('\n');
}
setText(strArray.toString());
} else {
JOptionPane.showMessageDialog(null, "打开失败，请重试。");
}
}
/**
* 调用打开对话框
*/
private void openDialogShow() {
jFileChooser1.setAcceptAllFileFilterUsed(false);
jFileChooser1.addChoosableFileFilter(new TextFileFilter("txt"));
int result = jFileChooser1.showOpenDialog(null);
if (result == JFileChooser.APPROVE_OPTION) {
pathOpenAddress = jFileChooser1.getSelectedFile().getAbsolutePath();
}
setTitle(pathOpenAddress);
}