JAVA-AWT-JPanel-07(GridBagLayout)03(계산기화면)

앞의 강의 GridBagLayout 01과 02 를 배웠다면 이제 계산기 화면을 구현하겠습니다.

import java.awt.GridBagConstraints; import java.awt.GridBagLayout; import java.awt.GridLayout;   import javax.swing.JButton; import javax.swing.JComponent; import javax.swing.JFrame; import javax.swing.JPanel;   public class G1 extends JFrame {           JPanel p1 = new JPanel();         JPanel p2 = new JPanel();         JButton b0 = new JButton("0");         JButton b1 = new JButton("1");         JButton b2 = new JButton("2");         JButton b3 = new JButton("3");         JButton b4 = new JButton("4");         JButton b5 = new JButton("5");         JButton b6 = new JButton("6");         JButton b7 = new JButton("7");         JButton b8 = new JButton("8");         JButton b9 = new JButton("9");         JButton b10 = new JButton(".");         JButton b11 = new JButton("+");         JButton b12 = new JButton("-");         JButton b13 = new JButton("*");         JButton b14 = new JButton("/");         JButton b15 = new JButton("( )");         JButton b16 = new JButton("<-");         JButton b17 = new JButton("CE");         JButton b18 = new JButton("=");           GridBagLayout grid = new GridBagLayout();         GridBagConstraints gbc = new GridBagConstraints();           public G1() {                                                             setLayout(new GridLayout(2,1));                                                             p1.setLayout(grid);                  gbc.fill = GridBagConstraints.BOTH;                gbc.weightx = 1.0;                gbc.weighty = 1.0;                  make(b17, 0, 0, 1, 1);                make(b16, 1, 0, 1, 1);                make(b15, 2, 0, 1, 1);                make(b14, 3, 0, 1, 1);                  make(b7, 0, 1, 1, 1);                make(b8, 1, 1, 1, 1);                make(b9, 2, 1, 1, 1);                make(b13, 3, 1, 1, 1);                  make(b4, 0, 2, 1, 1);                make(b5, 1, 2, 1, 1);                make(b6, 2, 2, 1, 1);                make(b12, 3, 2, 1, 1);                  make(b1, 0, 3, 1, 1);                make(b2, 1, 3, 1, 1);                make(b3, 2, 3, 1, 1);                make(b11, 3, 3, 1, 1);                  make(b0, 0, 4, 2, 1); // 아래의 make함수를 지정                make(b10, 2, 4, 1, 1);                make(b18, 3, 4, 1, 1);                               add(p2);                add(p1);                p1.add(b0);                p1.add(b1);                p1.add(b2);                p1.add(b3);                p1.add(b4);                p1.add(b5);                p1.add(b6);                p1.add(b7);                p1.add(b8);                p1.add(b9);                p1.add(b10);                p1.add(b11);                p1.add(b12);                p1.add(b13);                p1.add(b14);                p1.add(b15);                p1.add(b16);                p1.add(b17);                p1.add(b18);                               // ------------------------------------------------                setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);                // 프레임의 x버튼을 활성화하여 닫기버튼이 실행가능해짐                setSize(500, 500); // 프레임 사이즈 지정                setVisible(true); // 프레임을 보이게 함                setLocationRelativeTo(null); // 프레임 실행시 위치 중앙         }           // make함수를 내가 지정합니다.         // jcomponent인 jbutton의 객체에 x,y의 좌표의 시작점에서 w,h 크기의 단추를 만듭니다         public void make(JComponent c, int x, int y, int w, int h) {                gbc.gridx = x;                gbc.gridy = y;                gbc.gridwidth = w;                gbc.gridheight = h;                  grid.setConstraints(c, gbc);                // GridBagLayout의 GridBagConstraints의 set하는 방법           }           public static void main(String args[]) {                G1 test = new G1();           }   }

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