逃的过初一逃不过十五之三个输入框文本内容检测的实现及测试

package testing;

import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextArea;

public class testing {
    
    static boolean result;

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        
        //界面
        JFrame frame = new JFrame();
        frame.setTitle("Testing");
        frame.setSize(250,200);
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
        
        JPanel jp_top = new JPanel();
        jp_top.setLayout(null);
        jp_top.setBounds(0, 0, 300,300);
        
        final JTextArea []text = new JTextArea[3];
        for(int i=0;i<3;i++){
            text[i] = new JTextArea();
            text[i].setBounds(20, 20+40*i, 100, 20);
            jp_top.add(text[i]);
        }
        
        JButton button = new JButton("OK!");
        button.setBounds(140, 100, 80, 20);
        jp_top.add(button);
        
        //check        
        result = true;
        button.addMouseListener(new MouseAdapter(){
            public void mouseClicked(MouseEvent e){
                String []str = new String[3];
                for(int i=0;i<3;i++){
                    str[i] = new String();
                    str[i] = text[i].getText();
                }
                for(int i=0;i<3;i++){
                    if(str[i].length()>0 && str[i].length()<7){
                        for(int p=str[i].length()-1;p>=0;p--){
                            if(!Character.isDigit((str[i].charAt(p)))&&!Character.isLetter(str[i].charAt(p))) {
                                result = false;
                                break;                            
                            }
                        }
                    }
                    else {
                        result = false;
                    }
                }
                System.out.println(result);
            }
        });        
        
        frame.add(jp_top);
        frame.repaint();
    }
}