import java.awt.*; import java.awt.event.*; import javax.swing.*; public class GUI_1 extends JFrame{ public static void main(String[] args){ new GUI_1(); } public GUI_1(){ //画面の設定 setSize(500,500); setTitle("Java Programing"); setDefaultCloseOperation(EXIT_ON_CLOSE); //パネルを貼り付ける MyJPanel myJPanel= new MyJPanel(); Container c = getContentPane(); //コンテナの取得 c.add(myJPanel); //パネルを貼る setVisible(true); } public class MyJPanel extends JPanel{ public MyJPanel(){ } public void paintComponent(Graphics g) {//ここで絵を書く } } }