java制作的简易计算机（代码及效果图）

操作方法

• 01

  import java.awt.*; import javax.swing.*; import java.awt.event.*; import javax.swing.*;//GUi之前要吧这两个都引进来 public class Computer extends JFrame implements ActionListener { JButton a1,a2,a3,a4,a5,a6,a7,a8,a9,a0; JButton b1,b2,b3,b4; JButton c1,c2,c3,c4; JTextField t1,t2; JPanel p1,p2; JLabel bq1,bq2; String fuhao; Double count,count2; boolean chose=false,cliks; public static void main(String[] args){ Computer l = new Computer(); } public Computer(){ Font font = new Font("宋体", Font.BOLD, 36); Font font2 = new Font("宋体", Font.BOLD, 20); a1 = new JButton("1"); a1.setFont(font); a1.addActionListener(this); a2 = new JButton("2"); a2.setFont(font); a2.addActionListener(this); a3 = new JButton("3"); a3.setFont(font); a3.addActionListener(this); a4 = new JButton("4"); a4.setFont(font); a4.addActionListener(this); a5 = new JButton("5"); a5.setFont(font); a5.addActionListener(this); a6 = new JButton("6"); a6.setFont(font); a6.addActionListener(this); a7 = new JButton("7"); a7.setFont(font); a7.addActionListener(this); a8 = new JButton("8"); a8.setFont(font); a8.addActionListener(this); a9 = new JButton("9"); a9.setFont(font); a9.addActionListener(this); a0 = new JButton("0"); a0.setFont(font); a0.addActionListener(this); b1 = new JButton("清空"); b1.addActionListener(this); b2 = new JButton("返回"); b2.addActionListener(this); b3 = new JButton("."); b3.addActionListener(this); b4 = new JButton("="); b4.addActionListener(this); c1 = new JButton("+"); c1.addActionListener(this); c2 = new JButton("-"); c2.addActionListener(this); c3 = new JButton("x"); c3.addActionListener(this); c4 = new JButton("÷"); c4.addActionListener(this); t1 = new JTextField(25); t2 = new JTextField(35); t1.setFont(font2); t2.setFont(font2); p1 = new JPanel(); p2 = new JPanel(); bq1 = new JLabel("结"); bq2 = new JLabel("果"); p1.setLayout(new GridLayout(2,3)); p2.setLayout(new GridLayout(4,4)); p1.add(t1);p1.add(b1);p1.add(b2); p1.add(t2);p1.add(bq1);p1.add(bq2 ); p2.add(a1);p2.add(a2);p2.add(a3);p2.add(c1); p2.add(a4);p2.add(a5);p2.add(a6);p2.add(c2); p2.add(a7);p2.add(a8);p2.add(a9);p2.add(c3); p2.add(b3);p2.add(a0);p2.add(b4);p2.add(c4); this.add(p1,BorderLayout.NORTH); this.add(p2,BorderLayout.CENTER); this.setSize(460,380); this.setTitle("简易计算器"); this.setLocation(200,200); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.setVisible(true); } public void actionPerformed(ActionEvent e){ Object temp = e.getSource(); if(temp == a1){ if(chose==true){t1.setText("");t2.setText("");} t1.setText(t1.getText()+""+"1"); chose=false; } if(temp == a2){ if(chose==true){t1.setText("");t2.setText("");} t1.setText(t1.getText()+""+"2"); chose=false; } if(temp == a3){ if(chose==true){t1.setText("");t2.setText("");} t1.setText(t1.getText()+""+"3"); chose=false; } if(temp == a4){ if(chose==true){t1.setText("");t2.setText("");} t1.setText(t1.getText()+""+"4"); chose=false; } if(temp == a5){ if(chose==true){t1.setText("");t2.setText("");} t1.setText(t1.getText()+""+"5"); chose=false; } if(temp == a6){ if(chose==true){t1.setText("");t2.setText("");} t1.setText(t1.getText()+""+"6"); chose=false; } if(temp == a7){ if(chose==true){t1.setText("");t2.setText("");} t1.setText(t1.getText()+""+"7"); chose=false; } if(temp == a8){ if(chose==true){t1.setText("");t2.setText("");} t1.setText(t1.getText()+""+"8"); chose=false; } if(temp == a9){ if(chose==true){t1.setText("");t2.setText("");} t1.setText(t1.getText()+""+"9"); chose=false; } if(temp == a0){ if(chose==true){t1.setText("");t2.setText("");} t1.setText(t1.getText()+""+"0"); chose=false; } if(temp==b3){ cliks=true; for(int i=0;i<t1.getText().length();i++){ if('.'==t1.getText().charAt(i)){ cliks=false; break; } if(cliks==true){ t1.setText(t1.getText()+"."); } } } if(temp== c1){ count=Double.parseDouble(t1.getText()); t1.setText(""); fuhao = "+"; } if(temp== c2){ count=Double.parseDouble(t1.getText()); t1.setText(""); fuhao = "-"; } if(temp== c3){ count=Double.parseDouble(t1.getText()); t1.setText(""); fuhao = "*"; } if(temp== c4){ count=Double.parseDouble(t1.getText()); t1.setText(""); fuhao = "÷"; } if(temp==b1){ t1.setText(""); t2.setText(""); } if(temp==b2){ String s=t1.getText(); t1.setText(""); for(int i=0;i<s.length()-1;i++){ char a = s.charAt(i); t1.setText(t1.getText()+a); } } if(temp== b4){ count2=Double.parseDouble(t1.getText()); t1.setText(""); if(fuhao=="+"){ //int sum=count+count2; t1.setText(count+""+fuhao+""+count2+""+"="); t2.setText(count+count2+""); chose=true; } if(fuhao=="-"){ //int sum=count+count2; t1.setText(count+""+fuhao+""+count2+""+"="); t2.setText(count-count2+""); chose=true; } if(fuhao=="*"){ //int sum=count+count2; t1.setText(count+""+fuhao+""+count2+""+"="); t2.setText(count*count2+""); chose=true; } if(fuhao=="÷"){ //int sum=count+count2; if(count2==0){ t1.setText(count+""+fuhao+""+count2+""); t2.setText("除数不能为0"); return; } t1.setText(count+""+fuhao+""+count2+""+"="); t2.setText(count/count2+""); chose=true; } } } }