Java小程序之GUI开发简单前台登录界面

来源：互联网发布：算法分析的两个方面是编辑：程序博客网时间：2024/04/30 15:22

主要的类，做个了继承了JFrame类的新类

import java.awt.*;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.*;public class TextComponentFrame  extends JFrame {    public static final int TEXTAREA_ROWS = 8;    public static final int TEXTAREA_COLUMNS = 20;    public TextComponentFrame() {        final JTextField textField = new JTextField();        final JPasswordField passwordField = new JPasswordField();        JPanel northPanel = new JPanel();        northPanel.setLayout(new GridLayout(2,2));        northPanel.add(new JLabel("User name: ",SwingConstants.RIGHT));        northPanel.add(textField);        northPanel.add(new JLabel("PassWorld: ",SwingConstants.RIGHT));        northPanel.add(passwordField);        add(northPanel,BorderLayout.NORTH);        final JTextArea textArea = new JTextArea(TEXTAREA_ROWS,TEXTAREA_COLUMNS);        JScrollPane scrollPane = new JScrollPane(textArea);        this.add(scrollPane,BorderLayout.CENTER);        JPanel southPanel = new JPanel();        JButton insertButton = new JButton("Insert");        southPanel.add(insertButton);        insertButton.addActionListener(new ActionListener() {            public void actionPerformed(ActionEvent event) {                textArea.append("User name: " + textField.getText() + "Password: "+new String(passwordField.getPassword())+"\n");            }        });        add(southPanel,BorderLayout.SOUTH);        pack();    }}

启动类

import java.awt.*;import javax.swing.*;public class Hi {    public static void main(String[] args) {        //JFrame frame = new JFrame();        TextComponentFrame frame = new TextComponentFrame();        frame.setTitle("Hi Java");        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        frame.setVisible(true);    }}

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