用java写的正则表达式练习器.

  可能有人会说现在网上到处都是正则表达式的练习器,我也见过不少,有用html和javascript写的hta应用程序的,也有用C#写的,但是这个用java写的练习器当然是与java有关的哦.里面肯定有源字符串(str)和正则表达式(regex)的输入,只不过输出与其它不一样,输出的是

• str.split(regex)的结果.
• str.match(regex)的结果.
• 当然还有输出java.util.regex包里的一些使用结果.一般来说对用java的,练习正则有用吧,如果你对java.util.regex不怎么了解,这个代码可能会有点帮助.任何不懂的回复问我就是.
    源代码如下:
  

  import javax.swing.*;

  import java.awt.*;
  import java.awt.event.*;
  import java.util.regex.*;

  public class RegTest extends JFrame implements ActionListener{

  /**
  * @author hoverlees(好棒)
  */
  JTextField src=null;
  JTextField reg=null;
  JLabel match=null;
  JButton ok=new JButton("确定");
  Box b=null;
  JLabel result=new JLabel(" ");
  JLabel la1=new JLabel();
  JLabel la2=new JLabel();
  
  ///java.util.regex
  Pattern p=null;
  
  public RegTest(){
  super("java正则表达式练习");
  
  src=new JTextField("hoverlees@yahoo.com.cn 好棒e");
  reg=new JTextField("//De");
  match=new JLabel(" ");
  b=Box.createVerticalBox();
  Box b1=Box.createHorizontalBox();
  b1.add(new JLabel(" 源字符串(str):"));
  b1.add(src);
  b1.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
  b.add(b1);
  Box b2=Box.createHorizontalBox();
  b2.add(new JLabel("正则表达式(reg):"));
  b2.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
  b2.add(reg);
  b.add(b2);
  Box b3=Box.createHorizontalBox();
  b3.add(match);
  
  JLabel jl2=new JLabel("str.match(reg)完全匹配情况:");
  addBox(jl2,match);
  addBox(new JLabel("str.split(reg)结果('|'分隔):"),result);
  addBox(new JLabel("包含部分匹配情况:"),la1);
  addBox(new JLabel("所有部分匹配('|'分隔):"),la2);
  Box b5=Box.createHorizontalBox();
  b5.add(ok);
  b.add(b5);
  ok.addActionListener(this);
  this.getContentPane().add(b);
  this.setDefaultCloseOperation(3);
  this.pack();
  this.setSize(600,this.getHeight());
  this.getRootPane().setDefaultButton(ok);
  }
  private void addBox(JComponent o1,JComponent o2){
  Box temp=Box.createHorizontalBox();
  temp.add(o1);
  if(o2!=null) temp.add(o2);
  temp.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
  b.add(temp);
  temp.add(Box.createHorizontalGlue());
  }
  public void actionPerformed(ActionEvent e){
  match.setText(src.getText().matches(reg.getText()) ? "true":"false");
  String[] str=src.getText().split(reg.getText());
  StringBuilder sb=new StringBuilder();
  for(int i=0;i<str.length;i++){
  sb.append(str[i]);
  if(i!=str.length-1) sb.append("|");
  }
  result.setText(sb.toString());
  p=Pattern.compile(reg.getText());
  Matcher m=p.matcher(src.getText());
  la1.setText(m.find() ? "true":"false");
  StringBuilder sb2=new StringBuilder();
  sb2.append(m.group());
  while(m.find()){
  sb2.append("|");
  sb2.append(m.group());
  }
  la2.setText(sb2.toString());
  }
  public static void main(String[] args) {
  try {
  UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
  } catch (ClassNotFoundException e) {
  // TODO Auto-generated catch block
  e.printStackTrace();
  } catch (InstantiationException e) {
  // TODO Auto-generated catch block
  e.printStackTrace();
  } catch (IllegalAccessException e) {
  // TODO Auto-generated catch block
  e.printStackTrace();
  } catch (UnsupportedLookAndFeelException e) {
  // TODO Auto-generated catch block
  e.printStackTrace();
  }
  new RegTest().setVisible(true);
  }

  }