Java的GUI编程---Swing介绍
2024-04-21 20:11:37
Swing
窗口，面板
package com.akita.lesson03;import javax.swing.*;
import java.awt.*;public class JFrameDemo02 {public static void main(String[] args) {new MyJFrame02().init();}
}class MyJFrame02 extends JFrame {public void init() {this.setBounds(200, 200, 500, 500);//获得一个容器，只有这样设置颜色才会生效Container contentPane = this.getContentPane();contentPane.setBackground(Color.CYAN);//设置文字JLabel jLabel = new JLabel("akita");this.add(jLabel);//让文本标签居中jLabel.setHorizontalAlignment(SwingConstants.CENTER);setVisible(true);}
}
弹窗
package com.akita.lesson03;import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;//主窗口
public class DialogDemo extends JFrame {public DialogDemo() {this.setSize(500, 350);this.setLocation(300, 300);this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);//JFrame 放东西容器Container contentPane = this.getContentPane();//绝对布局contentPane.setLayout(null);//按钮JButton jButton = new JButton("点击弹出对话框");jButton.setBounds(30, 30, 200, 50);//点击这个按钮弹出一个弹窗jButton.addActionListener(new ActionListener() { //监听器@Overridepublic void actionPerformed(ActionEvent e) {//弹窗new MyDialogDD();}});contentPane.add(jButton);this.setVisible(true);}public static void main(String[] args) {new DialogDemo();}
}//弹窗的窗口
class MyDialogDD extends JDialog {public MyDialogDD() {this.setBounds(100, 100, 500, 500);Container contentPane = this.getContentPane();contentPane.setLayout(null);Label akita = new Label("akita");akita.setSize(50, 50);contentPane.add(akita);this.setVisible(true);}
}
标签
JLabel
JLabel jLabel = new JLabel("标签");
- Icon
package com.akita.lesson03;import javax.swing.*;
import java.awt.*;//图标是一个接口，需要实现类，并继承JFrame
public class IconDemo extends JFrame implements Icon {private int width;private int height;public IconDemo() {}public IconDemo(int width, int height) {this.width = width;this.height = height;}public void init() {IconDemo iconDemo = new IconDemo(15, 15);//图标要放在标签上JLabel jLabel = new JLabel("icon_test", iconDemo, SwingConstants.CENTER);Container contentPane = getContentPane();contentPane.add(jLabel);this.setBounds(200,200,400,340);this.setVisible(true);this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);}public static void main(String[] args) {new IconDemo().init();}@Overridepublic void paintIcon(Component c, Graphics g, int x, int y) {g.fillOval(x, y, width, height);}@Overridepublic int getIconWidth() {return this.width;}@Overridepublic int getIconHeight() {return this.height;}
}
ImageIcon
package com.akita.lesson03;import javax.swing.*;
import java.awt.*;
import java.net.URL;public class ImageIconDemo extends JFrame {public ImageIconDemo() {JLabel akita = new JLabel("akita");//获取图片地址URL url = ImageIconDemo.class.getResource("icon.png");ImageIcon imageIcon = new ImageIcon(url);akita.setIcon(imageIcon);akita.setHorizontalAlignment(SwingConstants.CENTER);Container container = getContentPane();container.add(akita);setVisible(true);setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);setBounds(200, 200, 500, 500);}public static void main(String[] args) {new ImageIconDemo();}
}面板
JPanel
package com.akita.lesson04;import com.akita.lesson03.JFrameDemo;import javax.swing.*;
import java.awt.*;public class JPanelDemo extends JFrame {public JPanelDemo() {this.setBounds(100, 100, 400, 400);this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);Container container = this.getContentPane();container.setLayout(new GridLayout(2, 2, 10, 10));JPanel jPanel1 = new JPanel(new GridLayout(1, 3));JPanel jPanel2 = new JPanel(new GridLayout(1, 2));JPanel jPanel3 = new JPanel(new GridLayout(2, 1));JPanel jPanel4 = new JPanel(new GridLayout(3, 2));jPanel1.add(new JButton("1"));jPanel1.add(new JButton("1"));jPanel1.add(new JButton("1"));jPanel2.add(new JButton("2"));jPanel2.add(new JButton("2"));jPanel3.add(new JButton("3"));jPanel3.add(new JButton("3"));jPanel4.add(new JButton("4"));jPanel4.add(new JButton("4"));jPanel4.add(new JButton("4"));jPanel4.add(new JButton("4"));jPanel4.add(new JButton("4"));jPanel4.add(new JButton("4"));container.add(jPanel1);container.add(jPanel2);container.add(jPanel3);container.add(jPanel4);this.setVisible(true);}public static void main(String[] args) {new JPanelDemo();}
}
运行结果
JScrollPane
package com.akita.lesson04;import javax.swing.*;
import java.awt.*;public class JScrollDemo extends JFrame {public JScrollDemo() {Container contentPane = this.getContentPane();//文本域JTextArea jTextArea = new JTextArea(20, 50);jTextArea.setText("akita");//Scroll面板JScrollPane jScrollPane = new JScrollPane(jTextArea);jScrollPane.setBackground(new Color(1, 1, 1));contentPane.add(jScrollPane);this.setVisible(true);this.setBounds(100, 100, 300, 300);this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);}public static void main(String[] args) {new JScrollDemo();}
}
运行效果
按钮
带图片的按钮
package com.akita.lesson04;import javax.swing.*;
import java.awt.*;
import java.net.URL;public class JButtonDemo01 extends JFrame {public JButtonDemo01() {Container container = this.getContentPane();//把图片转化成图标URL url = JButtonDemo01.class.getResource("icon.png");ImageIcon icon = new ImageIcon(url);//把这个图标放置在按钮上JButton jButton = new JButton();jButton.setIcon(icon);jButton.setToolTipText("akita");//addcontainer.add(jButton);setVisible(true);setBounds(100, 100, 200, 200);setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);}public static void main(String[] args) {new JButtonDemo01();}
}
运行效果
单选按钮
package com.akita.lesson04;import javax.swing.*;
import java.awt.*;public class JButtonDemo02 extends JFrame {public JButtonDemo02() {Container container = this.getContentPane();//单选框JRadioButton radioButton1 = new JRadioButton("radioButton1");JRadioButton radioButton2 = new JRadioButton("radioButton2");JRadioButton radioButton3 = new JRadioButton("radioButton3");//由于单选框只能选择一个，所以我们通常对他们进行分组ButtonGroup buttonGroup = new ButtonGroup();buttonGroup.add(radioButton1);buttonGroup.add(radioButton2);buttonGroup.add(radioButton3);//addcontainer.add(radioButton1, BorderLayout.CENTER);container.add(radioButton2, BorderLayout.NORTH);container.add(radioButton3, BorderLayout.SOUTH);this.setVisible(true);this.setBounds(200, 200, 500, 350);this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);}public static void main(String[] args) {new JButtonDemo02();}
}
运行效果
多选按钮
package com.akita.lesson04;import javax.swing.*;
import java.awt.*;public class JButtonDemo03 extends JFrame {public JButtonDemo03() {Container container = this.getContentPane();//多选框JCheckBox jCheckBox1 = new JCheckBox("jCheckBox1");JCheckBox jCheckBox2 = new JCheckBox("jCheckBox2");container.add(jCheckBox1, BorderLayout.NORTH);container.add(jCheckBox2, BorderLayout.SOUTH);this.setVisible(true);this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);this.setBounds(200, 200, 400, 250);}public static void main(String[] args) {new JButtonDemo03();}
}
运行效果
列表
下拉框
package com.akita.lesson05;import javax.swing.*;
import java.awt.*;public class TestComboboxDemo01 extends JFrame {public TestComboboxDemo01() {Container container = this.getContentPane();container.setBackground(new Color(1, 1, 1));JComboBox jComboBox = new JComboBox();jComboBox.addItem("love");jComboBox.addItem("lee");jComboBox.addItem("wzz");container.add(jComboBox);this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);this.setBounds(200, 200, 400, 250);this.setVisible(true);}public static void main(String[] args) {new TestComboboxDemo01();}
}
运行效果
列表框
package com.akita.lesson05;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 = {"akita", "wzz", "lee"};JList jList = new JList(contents);container.add(jList);this.setVisible(true);this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);this.setBounds(200, 200, 500, 350);}public static void main(String[] args) {new TestComboboxDemo02();}
}
运行效果
应用场景
- 对于下拉框可以设置选择地区，或者一些单个选项
- 列表框，用于展示信息，一般是动态扩容
文本框
文本框
package com.akita.lesson05;import javax.swing.*;
import java.awt.*;public class TestTextDemo01 extends JFrame {public TestTextDemo01() {Container container = this.getContentPane();JTextField jTextField1 = new JTextField("hello");JTextField jTextField2 = new JTextField("world", 20);container.add(jTextField1, BorderLayout.NORTH);container.add(jTextField2, BorderLayout.SOUTH);this.setVisible(true);this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);this.setBounds(200, 200, 400, 250);}public static void main(String[] args) {new TestTextDemo01();}
}
运行效果
密码框
package com.akita.lesson05;import javax.swing.*;
import java.awt.*;public class TestTextDemo02 extends JFrame {public TestTextDemo02() {Container container = this.getContentPane();JPasswordField passwordField = new JPasswordField();passwordField.setEchoChar('*');container.add(passwordField);this.setVisible(true);this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);this.setBounds(200, 200, 400, 350);}public static void main(String[] args) {new TestTextDemo02();}
}
运行效果
文本域
package com.akita.lesson05;import javax.swing.*;
import java.awt.*;public class TestTextDemo03 extends JFrame {public TestTextDemo03() {Container container = this.getContentPane();//文本域JTextArea jTextArea = new JTextArea(20, 50);jTextArea.setText("hello world!");//scroll面板JScrollPane jScrollPane = new JScrollPane(jTextArea);container.add(jScrollPane);this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);this.setVisible(true);this.setBounds(300, 300, 400, 250);}public static void main(String[] args) {new TestTextDemo03();}
}
运行效果
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