JDK6的新特性3
JDK6的新特性之十三:JTable的排序和过滤
JDK6的新特性之十三:JTable的排序和过滤
原来的JTable基本上是只能显示数据，在JDK6新增了对JTable的排序和过滤功能，下面代码演示了这两个功能
/**
* @author WuLi
*/
public class JTableTester {
static String data[][] = {
{"China","Beijing","Chinese"},
{"America","Washington","English"},
{"Korea","Seoul","Korean"},
{"Japan","Tokyo","Japanese"},
{"France","Paris","French"},
{"England","London","English"},
{"Germany","Berlin","German"},
};
static String titles[] = {"Country","Capital","Language"};
public static void main(String[] args) {
DefaultTableModel m = new DefaultTableModel(data,titles);
JTable t = new JTable(m);
final TableRowSorter sorter = new TableRowSorter(m);
t.setRowSorter(sorter); //为JTable设置排序器
JScrollPane sPane = new JScrollPane();
sPane.setViewportView(t);
JPanel p = new JPanel();
p.setLayout(new BoxLayout(p,BoxLayout.X_AXIS));
JLabel l = new JLabel("Criteria:");
final JTextField tf = new JTextField();
JButton b = new JButton("Do Filter");
p.add(l);
p.add(tf);
p.add(b);
b.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if(tf.getText().length()==0){
sorter.setRowFilter(null);
}else{
sorter.setRowFilter(RowFilter.regexFilter(tf.getText()));//为JTable设置基于正则表达式的过滤条件
}
}
});
JFrame f = new JFrame("JTable Sorting and Filtering");
f.getContentPane().add(sPane,BorderLayout.CENTER);
f.getContentPane().add(p,BorderLayout.SOUTH);
f.setSize(400,300);
f.setVisible(true);
}
}
运 行上面程序，单击JTable的某一个title，这个title对应的列就会按照升序/降序重新排列；在下面的Criteria文本框中输 入"ese"，点击"Do Filter"按钮，JTable将只显示带有"ese"字符串的行，也就是China和Japan两行，如果文本框里面什么都没有，点击"Do Filter"按钮，这时JTable会显示所有的行。
JDK6新特性之Compiler
创建Compiler.java和Hello.java
1.Compiler.java
import java.io.File;
import javax.tools.JavaCompiler;
import javax.tools.StandardJavaFileManager;
import javax.tools.ToolProvider;
public class Compiler {
public static void main(String args[]) {
try {
JavaCompiler jc = ToolProvider.getSystemJavaCompiler();
StandardJavaFileManager sjfm = jc.getStandardFileManager(null, null, null);
File javaFile = new File("Hello.java");
Iterable fileObjects = sjfm.getJavaFileObjects(javaFile);
jc.getTask(null, sjfm, null, null, null, fileObjects).call();
// Add more compilation tasks
sjfm.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
2.Hello.java
import java.util.Date;
public class Hello
{
public String getHelloWorld()
{
return "现在的时间为："+new Date();
}
}
编译运行即可，在工作目录下你会发现：Hello.class表示Compiler run OK.
很不错，挑个小毛病。
MenuItem edit = new MenuItem("Edit Text File");
sendMail.addActionListener(new ActionListener() { //这里应该是edit.addActionListener
public void actionPerformed(ActionEvent e) {
edit();
}
});