[Java] 창을 모니터 중앙에 띄우기 (GUI)/자바 JFrame

JFrame 창을 모니터 중앙에 띄울 수 있는 코드입니다. 

Dimension frameSize = getSize();
Dimension windowSize = Toolkit.getDefaultToolkit().getScreenSize();
setLocation((windowSize.width - frameSize.width) / 2,
            (windowSize.height - frameSize.height) / 2); 
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
setVisible(true);

 

예시  1 / JFrame을 상속받을때 

package com.company;
 
import javax.swing.*;
import java.awt.*;
 
public class Main extends JFrame {
    public Main(){
        super("티스토리");
        setSize(500, 600);
        Dimension frameSize = getSize();
        Dimension windowSize = Toolkit.getDefaultToolkit().getScreenSize();
        setLocation((windowSize.width - frameSize.width) / 2,
                (windowSize.height - frameSize.height) / 2);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        setVisible(true);
    }
    public static void main(String[] args) {
    // write your code here
    new Main();
    }
}

 

Dimension frameSize = getSize();
Dimension windowSize = Toolkit.getDefaultToolkit().getScreenSize();
setLocation((windowSize.width - frameSize.width) / 2,
            (windowSize.height - frameSize.height) / 2); 
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
setVisible(true);

 

예시  2 / JFrame 객체를 이용할 때  

package com.company;
 
import javax.swing.*;
import java.awt.*;
 
public class Main  {
    public Main(){
        JFrame jFrame = new JFrame("티스토리 2");
        jFrame.setSize(500, 600);
        Dimension frameSize = jFrame.getSize();
        Dimension windowSize = Toolkit.getDefaultToolkit().getScreenSize();
        jFrame.setLocation((windowSize.width - frameSize.width) / 2,
                (windowSize.height - frameSize.height) / 2);
        jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        jFrame.setVisible(true);
    }
    public static void main(String[] args) {
    // write your code here
    new Main();
    }
}