将定义的Jframe大小转换为基于屏幕大小的自动调整大小

Toolkit toolkit = Toolkit.getDefaultToolkit();
Dimension screenSize = toolkit.getScreenSize();
int screenWidth = screenSize.width;
int screenHeight = screenSize.height;

int frameWidth = (int) (screenWidth * 0.8); // 设置JFrame宽度为屏幕宽度的80%
int frameHeight = (int) (screenHeight * 0.8); // 设置JFrame高度为屏幕高度的80%
frame.setSize(frameWidth, frameHeight);

int frameX = (screenWidth - frameWidth) / 2; // 计算JFrame的水平位置
int frameY = (screenHeight - frameHeight) / 2; // 计算JFrame的垂直位置
frame.setLocation(frameX, frameY);

import javax.swing.*;
import java.awt.*;

public class AutoResizeFrame {
    public static void main(String[] args) {
        JFrame frame = new JFrame("自动调整大小的JFrame");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        Toolkit toolkit = Toolkit.getDefaultToolkit();
        Dimension screenSize = toolkit.getScreenSize();
        int screenWidth = screenSize.width;
        int screenHeight = screenSize.height;

        int frameWidth = (int) (screenWidth * 0.8); // 设置JFrame宽度为屏幕宽度的80%
        int frameHeight = (int) (screenHeight * 0.8); // 设置JFrame高度为屏幕高度的80%
        frame.setSize(frameWidth, frameHeight);

        int frameX = (screenWidth - frameWidth) / 2; // 计算JFrame的水平位置
        int frameY = (screenHeight - frameHeight) / 2; // 计算JFrame的垂直位置
        frame.setLocation(frameX, frameY);

        frame.setVisible(true);
    }
}