java jFrame

简介

java核心编程示例代码

code

/*
 * @Author: your name
 * @Date: 2020-10-28 17:06:45
 * @LastEditTime: 2020-10-28 19:09:28
 * @LastEditors: Please set LastEditors
 * @Description: In User Settings Edit
 * @FilePath: /java/SimpleFrameTest.java
 */
import java.awt.*;
import javax.swing.*;

public class SimpleFrameTest {
    public static void main(String[] args) {
        EventQueue.invokeLater(() -> {
            SimpleFrame frame = new SimpleFrame();
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            frame.setVisible(true);
        }); 
    }
}

class SimpleFrame extends JFrame {
    private static final int DEFAULT_WIDTH = 300;
    private static final int DEFAULT_HEIGHT = 200;

    public SimpleFrame() {
        setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
    }
}

code

获得屏幕大小设定程序为1/2大小显示

/*
 * @Author: your name
 * @Date: 2020-10-28 19:42:14
 * @LastEditTime: 2020-10-28 19:46:43
 * @LastEditors: Please set LastEditors
 * @Description: In User Settings Edit
 * @FilePath: /java/SizedFrameTest.java
 */
import java.awt.*;
import javax.swing.*;

public class SizedFrameTest {
    public static void main(String[] args) {
        EventQueue.invokeLater(() -> {
            JFrame frame = new SizedFrame();
            frame.setTitle("SizedFrame");
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            frame.setVisible(true);
        });
    }
}

class SizedFrame extends JFrame {
    public SizedFrame() {
        Toolkit kit = Toolkit.getDefaultToolkit();
        Dimension screenSize = kit.getScreenSize();
        int screenHeight = screenSize.height;
        int screenWidth = screenSize.width;

        setSize(screenWidth / 2, screenHeight / 2);
        setLocationByPlatform(true);

        Image img = new ImageIcon("icon.gif").getImage();
        setIconImage(img);
    }
}