Java 獲取窗口的寬、高

創建一個新窗口，通過getSize()獲取這個窗口的寬、高。

 

import javax.swing.JFrame;

public class WindowInTheMiddle extends JFrame {
    
    
    public static void main(String[] args) {
        WindowInTheMiddle window = new WindowInTheMiddle();
        window.launchFrame();
        
        // Width & Height
        System.out.println(window.getSize().getWidth());
        System.out.println(window.getSize().getHeight());
    }
    
    public void launchFrame() {
        this.setTitle("Hello World! I'm coming!");
        this.setSize(500, 500);
        this.setLocation(300, 300);
        this.setVisible(true);
    }
}