JAVA语言实现计算器

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                                                                                              JAVA语言实现计算器

                                                                                              Design By 海上的雨

软件界面如下

完整实现代码

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;public class Jisuanqi {public static void main(String[] args) {new MyFrame("计算器");}}
class MyFrame extends Frame{private static final long serialVersionUID = 1L;private TextArea ta,tb;public MyFrame(String title){super(title);SetTextAreas();SetButtonArea();SetMainFram();}private void SetButtonArea() {addButton("7",33,28,20,178);addButton("8",33,28,58,178);addButton("9",33,28,96,178);addButton("/",33,28,134,178);addButton("%",33,28,172,178);addButton("4",33,28,20,210);addButton("5",33,28,58,210);addButton("6",33,28,96,210);addButton("*",33,28,134,210);addButton("1/x",33,28,172,210);addButton("1",33,28,20,242);addButton("2",33,28,58,242);addButton("3",33,28,96,242);addButton("-",33,28,134,242);addButton("0",71,28,20,274);addButton(".",33,28,96,274);addButton("+",33,28,134,274);addButton("=",33,60,172,242);}double m,n;String  k;boolean flag =true;boolean flag2 =false;private void addButton(String string, int i, int j,int x,int y) {final Button b = new Button(string);b.setLocation(x, y);b.setSize(i, j);b.setFont(new Font("标楷体", Font.BOLD, 15));b.setBackground(Color.pink); b.setForeground(Color.darkGray);b.addMouseListener(new MouseAdapter() {@Overridepublic void mousePressed(MouseEvent e) {counts();}private void counts() {if(ta.getText().equals("")&&(b.getActionCommand().equals("+")||b.getActionCommand().equals("-")||b.getActionCommand().equals("*")||b.getActionCommand().equals("/")||b.getActionCommand().equals("%")||b.getActionCommand().equals("1/x")||b.getActionCommand().equals("="))) {}else if(ta.getText().equals(".")&&(b.getActionCommand().equals("+")||b.getActionCommand().equals("-")||b.getActionCommand().equals("*")||b.getActionCommand().equals("/")||b.getActionCommand().equals("%")||b.getActionCommand().equals("1/x")||b.getActionCommand().equals("="))){}else {if(		b.getActionCommand().equals("+")||b.getActionCommand().equals("-")||b.getActionCommand().equals("*")||b.getActionCommand().equals("%")||b.getActionCommand().equals("1/x")||b.getActionCommand().equals("/")){if(flag2 = true) {flag2 = false;}if(flag) {n = new Double(ta.getText()).doubleValue();flag = false;}else {if(k=="="){}else {m = new Double(ta.getText()).doubleValue();if(k == "-") {if(n==0)n = m;elsen=n-m;}else if(k == "+") {if(n==0)n = m;elsen=n+m;}else if(k == "*") {if(n==0)n = m;elsen=n*m;}else if(k=="%"){if(n==0)n=m;elsem=m*100;}else if(k=="1/x"){if(n==0)n=m;elsen=1/m;}else if(k == "/") {if(n==0)n = m;elsen=n/m;}}}k = b.getActionCommand();ta.setText("");	}else if(b.getActionCommand().equals("=")) {m = new Double(ta.getText()).doubleValue();if(k == "+") {ta.setText("");ta.append(n+"+"+m);ta.append(System.getProperty("line.separator"));n = n+m;ta.append("="+n);}else if(k == "-") {ta.setText("");ta.append(n+"-"+m);ta.append(System.getProperty("line.separator"));n = n-m;ta.append("="+n);}else if(k == "*") {ta.setText("");ta.append(n+"*"+m);ta.append(System.getProperty("line.separator"));n = n*m;ta.append("="+n);}else if(k == "%") {ta.setText("");ta.append("%"+m);ta.append(System.getProperty("line.separator"));m = m*100;ta.append("="+m+"%");}else if(k == "1/x") {ta.setText("");ta.append(1+"/"+m);ta.append(System.getProperty("line.separator"));n = 1/m;ta.append("="+n);			}else if(k == "/") {ta.setText("");ta.append(n+"/"+m);ta.append(System.getProperty("line.separator"));n= n/m;ta.append("="+n);}k="=";flag2 = true;}else {if(flag2) {flag = true;flag2 = false;ta.setText("");m = n =0;}ta.append(b.getActionCommand());}}}});	this.add(b);}private void SetTextAreas() {ta = new TextArea("0",8,52,3);ta.setBackground(Color.lightGray);ta.setSize(190, 50);ta.setFont(new Font("标楷体", Font.BOLD, 15));ta.setLocation(20,60);this.add(ta);tb = new TextArea("  DESIGN BY 海与怡",8,52,3);tb.setBackground(Color.pink);tb.setSize(190,25);tb.setFont(new Font("标楷体", Font.BOLD, 16));tb.setForeground(Color.blue);tb.setLocation(20,130);this.add(ta);this.add(tb);}@SuppressWarnings("deprecation")private void SetMainFram() {this.setLayout(null);this.setSize(220,310);this.setVisible(true);this.setLocation(310, 340);this.setResizable(false);ta.setEditable(false);tb.setEditable(false);this.setCursor(Cursor.HAND_CURSOR);this.addWindowListener(new WindowAdapter() {public void windowClosing(WindowEvent e) {System.exit(0);}});			}
}

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