GUI编程--3 Swing
GUI编程-3 Swing
3.1 JFrame 窗口
窗口：
package com.ssl.lesson04;
import javax.swing.*;
import java.awt.*;
public class JframeDemo {
//init():初始化
public void init(){
JFrame jf = new JFrame("这是一个JFrame窗口！");
jf.setVisible(true);
jf.setBounds(100,100,400,400);
jf.setBackground(new Color(11, 81, 231)); //这个设置不了颜色
//通过获取容器设置背景颜色
Container contentPane = jf.getContentPane();
contentPane.setBackground(Color.BLUE);
//设置文字JLabel
JLabel label = new JLabel("这是一个Jlabel的标签");
jf.add(label);
//让文本标签居中
label.setHorizontalAlignment(SwingConstants.CENTER);
//关闭事件
jf.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}
public static void main(String[] args) {
//建立一个窗口
new JframeDemo().init();
}
}
3.2 弹窗
package com.ssl.lesson04;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class DialogDemo extends JFrame {
public DialogDemo(){
this.setVisible(true);
this.setSize(700,500);
this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
//JFrame
Container container = this.getContentPane();
//绝对布局
container.setLayout(null);
//按钮
JButton button = new JButton("弹出一个对话框");
button.setBounds(30,30,200,50);
this.add(button);
button.addActionListener(new ActionListener() { //监听器
@Override
public void actionPerformed(ActionEvent e) {
//弹窗
new MyDialogDemo();
}
});
}
public static void main(String[] args) {
new DialogDemo();
}
}
//弹窗的窗口
class MyDialogDemo extends JDialog{
public MyDialogDemo(){
this.setVisible(true);
this.setBounds(100,100,100,100);
//this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
//默认有关闭事件
Container container = this.getContentPane();
container.setLayout(null);
//container.add(new Label("111")); 为啥不显示内容
}
}
3.3 标签
label
new JLabel("xxx");
设置图标：ICON
图标
package com.ssl.lesson04;
import javax.swing.*;
import java.awt.*;
//图标:需要实现类，Frame继承
public class IconDemo extends JFrame implements Icon {
private int width;
private int height;
public IconDemo(){} //无参构造
public IconDemo(int width,int height){
this.width=width;
this.height=height;
}
public void init(){
IconDemo iconDemo = new IconDemo(15,15);
//图标可以放在标签上，也可以放在按钮上
JLabel label = new JLabel("Icontest", iconDemo, SwingConstants.CENTER);
Container container = this.getContentPane();
container.add(label);
this.setBounds(40,40,200,200);
this.setVisible(true);
this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}
public static void main(String[] args) {
new IconDemo().init();
}
@Override
public void paintIcon(Component c, Graphics g, int x, int y) {
g.fillOval(x,y,this.width,this.height);
}
@Override
public int getIconWidth() {
return this.width;
}
@Override
public int getIconHeight() {
return this.height;
}
}
图片
package com.ssl.lesson04;
import javax.swing.*;
import java.awt.*;
import java.net.URL;
public class ImageIconDemo extends JFrame {
public ImageIconDemo(){
JLabel label = new JLabel("ImageIcon");
//获取图片地址
URL url = ImageIconDemo.class.getResource("T.png");
ImageIcon imageIcon = new ImageIcon(url);
label.setIcon(imageIcon);
//标签居中
label.setHorizontalAlignment(SwingConstants.CENTER);
Container container = this.getContentPane();
container.add(label);
this.setBounds(40,40,200,200);
this.setVisible(true);
this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}
public static void main(String[] args) {
new ImageIconDemo();
}
}
3.4 面板
package com.ssl.lesson05;
import javax.swing.*;
import java.awt.*;
public class JPanelDemo extends JFrame {
public JPanelDemo(){
Container container = this.getContentPane();
container.setLayout(new GridLayout(2,1,10,10)); //后2个参数，间距
JPanel panel = new JPanel(new GridLayout(1,3));
panel.add(new JButton("1"));
panel.add(new JButton("2"));
panel.add(new JButton("3"));
//添加面板
container.add(panel);
this.setVisible(true);
this.setBounds(40,40,500,500);
this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}
public static void main(String[] args) {
new JPanelDemo();
}
}
- 滑动窗口JScroll
package com.ssl.lesson05;
import javax.swing.*;
import java.awt.*;
public class JScrollDemo extends JFrame {
public JScrollDemo(){
Container container = this.getContentPane();
//文本域
JTextArea textArea = new JTextArea(20,20);
textArea.setText("欢迎学习java GUI编程");
//Scroll面板
JScrollPane jScrollPane = new JScrollPane(textArea);
container.add(jScrollPane);
this.setVisible(true);
this.setBounds(200,200,500,200);
this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}
public static void main(String[] args) {
new JScrollDemo();
}
}
3.5 按钮
- 图片按钮
package com.ssl.lesson05;
import javax.swing.*;
import java.awt.*;
import java.net.URL;
public class JButtonDemo01 extends JFrame {
public JButtonDemo01(){
Container container = this.getContentPane();
//将一个图片变成图标
URL resource = JButtonDemo01.class.getResource("T.png");
ImageIcon imageIcon = new ImageIcon(resource);
//把图标放到按钮上
JButton button = new JButton();
button.setIcon(imageIcon);
button.setToolTipText("图片按钮");
//加到容器上
container.add(button);
this.setVisible(true);
this.setBounds(200,200,400,400);
this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}
public static void main(String[] args) {
new JButtonDemo01();
}
}
- 单选按钮
package com.ssl.lesson05;
import javax.swing.*;
import java.awt.*;
public class JButtonDemo02 extends JFrame{
public JButtonDemo02(){
Container container = this.getContentPane();
//单选按钮
JRadioButton jRadioButton1 = new JRadioButton("JRadioButton01");
JRadioButton jRadioButton2 = new JRadioButton("JRadioButton02");
JRadioButton jRadioButton3 = new JRadioButton("JRadioButton03");
//单选框一般只能选择一个，一般都要分组。一个组中只能选择一个。
ButtonGroup buttonGroup = new ButtonGroup();
buttonGroup.add(jRadioButton1);
buttonGroup.add(jRadioButton2);
buttonGroup.add(jRadioButton3);
container.add(jRadioButton1,BorderLayout.CENTER);
container.add(jRadioButton2,BorderLayout.NORTH);
container.add(jRadioButton3,BorderLayout.SOUTH);
this.setVisible(true);
this.setBounds(200,200,400,400);
this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}
public static void main(String[] args) {
new JButtonDemo02();
}
}
- 复选按钮
package com.ssl.lesson05;
import javax.swing.*;
import java.awt.*;
public class JButtonDemo03 extends JFrame{
public JButtonDemo03(){
Container container = this.getContentPane();
//多选按钮
JCheckBox jCheckBox01 = new JCheckBox("1");
JCheckBox jCheckBox02 = new JCheckBox("2");
JCheckBox jCheckBox03 = new JCheckBox("3");
container.add(jCheckBox01,BorderLayout.SOUTH);
container.add(jCheckBox02,BorderLayout.NORTH);
container.add(jCheckBox03,BorderLayout.CENTER);
this.setVisible(true);
this.setBounds(200,200,400,400);
this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}
public static void main(String[] args) {
new JButtonDemo03();
}
}
3.6 列表
- 下拉框
package com.ssl.lesson06;
import javax.swing.*;
import java.awt.*;
public class TestComboboxDemo01 extends JFrame {
public TestComboboxDemo01(){
Container container = this.getContentPane();
//列表
JComboBox status = new JComboBox();
status.addItem(null);
status.addItem("正在热映");
status.addItem("已下架");
status.addItem("即将上映");
container.add(status);
this.setVisible(true);
this.setBounds(400,400,200,200);
this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}
public static void main(String[] args) {
new TestComboboxDemo01();
}
}
- 列表框
package com.ssl.lesson06;
import javax.swing.*;
import java.awt.*;
public class TestComboboxDemo02 extends JFrame {
public TestComboboxDemo02(){
Container container = this.getContentPane();
//生成列表内容
String[] contents = {"1","2","3"};
//列表中需要放入内容
JList jList = new JList(contents);
container.add(jList);
this.setVisible(true);
this.setBounds(400,400,200,200);
this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}
public static void main(String[] args) {
new TestComboboxDemo02();
}
}
应用场景：
- 选择地区，或者一些单个选项。
- 列表，展示信息，一般是动态扩容。
3.7 文本框
- 文本框
package com.ssl.lesson06;
import javax.swing.*;
import java.awt.*;
public class TestTextDemo01 extends JFrame {
public TestTextDemo01(){
Container container = this.getContentPane();
//文本框
JTextField jTextField = new JTextField("hello");
container.add(jTextField);
this.setVisible(true);
this.setBounds(400,400,200,200);
this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}
public static void main(String[] args) {
new TestTextDemo01();
}
}
- 密码框
package com.ssl.lesson06;
import javax.swing.*;
import java.awt.*;
public class TestTextDemo02 extends JFrame {
public TestTextDemo02(){
Container container = this.getContentPane();
//密码框
JPasswordField jPasswordField = new JPasswordField();
//可以设置
jPasswordField.setEchoChar('*');
container.add(jPasswordField);
this.setVisible(true);
this.setBounds(400,400,200,200);
this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}
public static void main(String[] args) {
new TestTextDemo02();
}
}
- 文本域
package com.ssl.lesson06;
import javax.swing.*;
import java.awt.*;
public class TestTextDemo03 extends JFrame {
public TestTextDemo03(){
Container container = this.getContentPane();
//文本域
JTextArea textArea = new JTextArea(20,20);
textArea.setText("欢迎学习java GUI编程");
//Scroll面板
JScrollPane jScrollPane = new JScrollPane(textArea);
container.add(jScrollPane);
this.setVisible(true);
this.setBounds(400,400,200,200);
this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}
public static void main(String[] args) {
new TestTextDemo03();
}
}
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