import java.awt.*;
import java.awt.event.*;
public class Calculator extends Frame{
static Panel pan = new Panel();
static Label lab = new Label("0.",Label.RIGHT);
static Button b0,b1,b2,b3,b4,b5,b6,b7,b8,b9,bp,ba,bs,bm,bd,be;
public static void main (String args[]) {
Calculator fm = new Calculator();
b0 = new Button("0");
b1 = new Button("1");
b2 = new Button("2");
b3 = new Button("3");
b4 = new Button("4");
b5 = new Button("5");
b6 = new Button("6");
b7 = new Button("7");
b8 = new Button("8");
b9 = new Button("9");
bp = new Button(".");
ba = new Button("+");
bs = new Button("-");
bm = new Button("*");
bd = new Button("/");
be = new Button("=");
fm.setTitle("计算器");
fm.setLayout(null);
fm.setSize(400,500);
GridLayout grid = new GridLayout(4,4);
pan.setLayout(grid);
pan.setBounds(20,100,300,350);
lab.setBounds(20,35,300,50);
lab.setBackground(Color.cyan);
pan.add(b7);pan.add(b8);pan.add(b9);pan.add(bd);
pan.add(b4);pan.add(b5);pan.add(b6);pan.add(bm);
pan.add(b1);pan.add(b2);pan.add(b3);pan.add(bs);
pan.add(b0);pan.add(bp);pan.add(be);pan.add(ba);
fm.add(lab);
fm.add(pan);
fm.setVisible(true);
}
}
我想关闭这个窗口 怎么写关闭窗口的代码?
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