paixu.java

用ＪＡＶＡ 编写的一个菜单程序 实现了一些基本计算和信息的录入

import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;


public class Paixu extends JDialog implements ActionListener {

	 JPanel p1=new JPanel();
	 JPanel p2=new JPanel();
	 JPanel p3=new JPanel();
	 JTextField tf = new JTextField(10);
     JTextArea ta1 = new JTextArea(2,10);
     JTextArea ta2 = new JTextArea(2,10);
	 JButton button = new JButton("排序");
    
	public Paixu() {
		setModal(true);
		setBackground(Color.blue);
		Container contentPane=this.getContentPane();
		contentPane.setLayout(new GridLayout(5,1));
		p1.add(new JLabel("请输入排序数个数"));p1.add(tf);p1.add(button);
		p2.add(new JLabel("未排序的数是"));p2.add(ta1);
		p3.add(new JLabel("排序后的数是"));p3.add(ta2);
		
		button.addActionListener(this);
		
		
		contentPane.add(p1);
		contentPane.add(p2);
		contentPane.add(p3);
		
		setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
		setSize(400,200);
		setTitle("排序");
		setVisible(true);	
	}
	public void actionPerformed(ActionEvent e) {
		String text = "";
		Random radom = new Random();
		try {
			int num = new Integer(tf.getText());
			Integer[] nums = new Integer[num];
			if (e.getSource() == tf || e.getSource() == button) {
				for (int i = 0; i < num; i++) {
					nums[i] =10+radom.nextInt(90);
					//nums[i] = radom.nextInt() % 100;
					text += nums[i] + " ";
				}
				ta1.setText(text);
				int temp;
				for (int i = 0; i < num; i++) {
					for (int j = i; j < num; j++) {
						if (nums[i] <= nums[j]) {
							temp = nums[i];
							nums[i] = nums[j];
							nums[j] = temp;
						}
					}
				}
				text = "";
				for (int i = 0; i < num; i++) {
					text += nums[i] + " ";
				}
				ta2.setText(text);
			}
		} catch (Exception ee) {
			JOptionPane.showMessageDialog(null, "请输入整数！");
			tf.setText(null);
			ta1.setText(null);
			ta2.setText(null);
			tf.requestFocus();
		}
	}
}