本文目录一览：
Java编写图形用户界面程序
运行如图
参考代码如下
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class RegDemo extends JFrame implements ActionListener{
JTextField jtf;
JPasswordField jpf;
public RegDemo() {
//组件的创建, 和布局安排
JPanel jpc = new JPanel();//默认流式布局
JPanel jp1 = new JPanel(new GridLayout(2, 2,5,10));//网格布局
jp1.setBorder(BorderFactory.createTitledBorder("用户注册"));
JLabel jl1 = new JLabel("用户名:");
jtf = new JTextField(10);
JLabel jl2 = new JLabel("密码:");
jpf = new JPasswordField(10);
jpf.setEchoChar('*');//用*号来隐藏密码的显示
jp1.add(jl1);jp1.add(jtf);
jp1.add(jl2);jp1.add(jpf);
jpc.add(jp1);
add(jpc);
JButton jb1 = new JButton("提交");
jb1.addActionListener(this);
jb1.setActionCommand("yes");
JButton jb2 = new JButton("取消");
jb2.addActionListener(this);
jb2.setActionCommand("no");
JPanel jp2 = new JPanel();
jp2.add(jb1);jp2.add(jb2);
add(jp2,BorderLayout.SOUTH);
setTitle("用户注册界面");
setSize(280, 280);
setLocationRelativeTo(null);//窗口居中
setDefaultCloseOperation(EXIT_ON_CLOSE);//
setVisible(true);
}
public static void main(String[] args) {
new RegDemo();
}
@Override
public void actionPerformed(ActionEvent e) {
if(e.getActionCommand().equals("yes")){
String name = jtf.getText().trim();
String pwd = new String(jpf.getPassword());
if(name.equals("")||pwd.equals("")){
JOptionPane.showMessageDialog(this, "你还没有输入用户名或者密码");
}else{
JOptionPane.showMessageDialog(this, "注册成功!用户名"+name+",密码"+pwd);
}
}else{
jtf.setText("");
jpf.setText("");
}
}
}
怎样运行JAVA的图形界面
如有个为Hello.java的文件
首先运行里输入cmd
找到你保存的java安装路径bin下（也可设置环境变量，就可以保存在其他位置,具体怎么设置好多书上有，如果不知道可以联系我）
然后输入javac Hello.java
再输入java Hello
这样它就会生成一个叫Hello.class文件
再打开个记事本
输入下面的代码：
html
body
applet code="Hello.class" height=200 width=300
/applet
/body
/html
保存在bin目录下Hello（自定义的）.html
再cmd中输入appletviewer Hello.html就行了
Java编写一个图形界面
我觉得还是我的好些。。。
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.Toolkit;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.io.FileOutputStream;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
public class TestSwing extends JFrame{
private JLabel label1, label2, label3, label4,label5,label6,label7;
private JPanel panel,panel1,panel2;
private JTextField tField1,tField2,tField3,tField4,tField5,tField6,tField7,tField8,tField9;
private JButton button;
private String filepath="c:\\info.dat";
public TestSwing(){
init();
this.setSize(300, 280);
this.setLocation(
(Toolkit.getDefaultToolkit().getScreenSize().width - this
.getSize().width) / 2,
(Toolkit.getDefaultToolkit().getScreenSize().height - this
.getSize().height) / 2);
this.setResizable(false);
this.setVisible(true);
this.setTitle("info");
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public void init(){
initPanel();
initLabel();
initTextField();
initButton();
initContent();
}
private void initContent(){
panel1.add(label1);
panel1.add(tField1);
panel1.add(label2);
panel1.add(tField2);
panel1.add(label3);
panel1.add(tField3);
panel1.add(label4);
panel1.add(tField4);
panel1.add(label5);
panel1.add(tField5);
panel1.add(label6);
panel1.add(tField6);
panel1.add(label7);
panel1.add(tField7);
panel1.add(tField8);
panel1.add(tField9);
panel2.add(button);
panel.add(panel1,BorderLayout.CENTER);
panel.add(panel2,BorderLayout.SOUTH);
getContentPane().add(panel);
}
private void initPanel(){
panel = new JPanel();
panel.setLayout(new FlowLayout());
panel.setBackground(Color.WHITE);
panel1 = new JPanel();
GridLayout upLayout = new GridLayout(8, 2);
panel1.setLayout(upLayout);
panel2 = new JPanel();
panel2.setLayout(new FlowLayout());
}
private void initLabel(){
label1 = new JLabel("IP地址", SwingConstants.LEFT);
label2 = new JLabel("端口", SwingConstants.LEFT);
label3 = new JLabel("访问地址", SwingConstants.LEFT);
label4 = new JLabel("XXXXX", SwingConstants.LEFT);
label5 = new JLabel("XXXXX", SwingConstants.LEFT);
label6 = new JLabel("XXXXX", SwingConstants.LEFT);
label7 = new JLabel("XXXXX", SwingConstants.LEFT);
}
private void initTextField(){
tField1 = new JTextField(10);
tField2 = new JTextField(10);
tField3 = new JTextField(10);
tField4 = new JTextField(10);
tField5 = new JTextField(10);
tField6 = new JTextField(10);
tField7 = new JTextField(10);
tField8 = new JTextField(10);
tField9 = new JTextField(10);
}
private void initButton(){
button = new JButton("完成");
button.addMouseListener(new MouseAdapter(){
//左键点击
public void mouseClicked(MouseEvent e) {
String ipv = tField1.getText().trim();
String portv = tField2.getText().trim();
String addrv = tField3.getText().trim();
String xx1v = tField4.getText().trim();
String xx2v = tField5.getText().trim();
String xx3v = tField6.getText().trim();
String xx4v = tField7.getText().trim();
String inputx = tField8.getText().trim();
String inputxv = tField9.getText().trim();
createFile(ipv, portv, addrv, xx1v, xx2v, xx3v, xx4v, inputx, inputxv);
JOptionPane.showMessageDialog(null, "保存成功");
tField1.setText("");
tField2.setText("");
tField3.setText("");
tField4.setText("");
tField5.setText("");
tField6.setText("");
tField7.setText("");
tField8.setText("");
tField9.setText("");
}
});
}
public static void main(String[]args){
new TestSwing();
}
private void createFile(String ipv,String portv ,String addrv,String xx1v,String xx2v,String xx3v,String xx4v,String inputx,String inputxv){
StringBuffer context = new StringBuffer();
context.append("ip=").append(ipv).append("\n");
context.append("port=").append(portv).append("\n");
context.append("addr=").append(addrv).append("\n");
context.append("xx1=").append(xx1v).append("\n");
context.append("xx2=").append(xx2v).append("\n");
context.append("xx3=").append(xx3v).append("\n");
context.append("xx4=").append(xx4v).append("\n");
context.append(inputx).append("=").append(inputxv).append("");
FileOutputStream fos = null;
try {
fos = new FileOutputStream(filepath);
fos.write(context.toString().getBytes());
} catch (Exception e) {
} finally {
if (fos != null)
try {
fos.close();
} catch (Exception e) {
}
}
}
}
java怎么实现图形化界面
java图形化界面还是有很多内容要学习的，可以参考 如下实例：
public class Test extends JFrame{
MyPanel mp=null;
public static void main(String[] args){
// TODO Auto-generated method stub
Test jf= new Test();
}
public Test(){
mp=new MyPanel();
this.add(mp);
//设置标题
this.setTitle("绘图");
//设置窗体大小
this.setSize(400, 300);
//设置窗体的位置
this.setLocation(100,100);
//限制窗体的大小
this.setResizable(false);
//关闭窗体时，同时退出java虚拟机
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//显示窗体
this.setVisible(true);
}
}
//定义一个MyPanel(我自己的面板，用于绘图和实现绘图区域)
class MyPanel extends JPanel
{
//覆盖JPanel的paint方法
//Graphics是绘图的重要类，可以把它理解成一只画笔
public void paint(Graphics g)
{
//1。调用父类函数完成初始化
super.paint(g);
// //画圆
// g.drawOval(100, 100, 20, 20);
// //画直线
// g.drawLine(50, 150,150, 200);
// //画矩形边框
// g.drawRect(150, 150, 30, 40);
//
// //设置颜色。默认为黑色
// g.setColor(Color.blue);
// //填充矩形
// g.fillRect(10, 10, 20, 30);
//画弧形
g.drawArc(200,10, 100,150, 120,-80);
//在面板上画图片
Image im=Toolkit.getDefaultToolkit().getImage(Panel.class.getResource("图片路径"));
//显示图片
g.drawImage(im, 10, 10,200,180,this);
//画字
g.setColor(Color.red);
g.setFont(new Font("华文彩云",Font.BOLD,20));
g.drawString("要写的字", 80,220);
}
}
