计算器 java源代码

//package 娱乐;   
import java.awt.Container;   
import java.awt.FlowLayout;   
import java.awt.GridLayout;   
import java.awt.event.ActionEvent;   
import java.awt.event.ActionListener;   
import java.awt.event.ItemEvent;   
import java.awt.event.ItemListener;   
import java.text.DecimalFormat;   
import javax.swing.*;   
  
public class 计算器 extends JFrame implements ActionListener, ItemListener {   
private JButton an[];   
  
private JButton qingkong, zh;   
  
private JTextField k;   
  
private JPanel rq1, rq2, rq3;   
  
int zz = 1;   
  
private String string[] = { "7", "8", "9", "/", "6", "5", "4", "*", "3",   
    "2", "1", "-", "0", ".", "=", "+" };   
  
private String s = "", shu1 = "", shu2 = "", shu3 = "";   
  
private static int fo = 0;   
  
JComboBox a;   
  
private boolean ff = true;   
  
public 计算_复杂() {   
   super("进制计算器");   
   Container c = getContentPane();   
   c.setLayout(new FlowLayout());   
   rq1 = new JPanel();   
   k = new JTextField(13);   
   rq1.add(k);   
   qingkong = new JButton("C");   
   rq1.add(qingkong);   
   c.add(rq1);   
   rq3 = new JPanel();   
   a = new JComboBox();   
   a.addItem("10进制转换为2进制");   
   a.addItem("10进制转换为8进制");   
   a.addItem("10进制转换为16进制");   
   a.addItem("2进制转换为8进制");   
   a.addItem("2进制转换为10进制");   
   a.addItem("2进制转换为16进制");   
   a.addItem("8进制转换为2进制");   
   a.addItem("8进制转换为10进制");   
   a.addItem("8进制转换为16进制");   
   a.addItem("16进制转换为2进制");   
   a.addItem("16进制转换为8进制");   
   a.addItem("16进制转换为10进制");   
   rq3.add(a);   
   zh = new JButton("转");   
   rq3.add(zh);   
   c.add(rq3);   
   rq2 = new JPanel();   
   rq2.setLayout(new GridLayout(4, 4, 10, 10));   
   an = new JButton[string.length];   
   for (int i = 0; i < string.length; i++) {   
    an[i] = new JButton(string[i]);   
    an[i].addActionListener(this);   
    rq2.add(an[i]);   
   }   
   c.add(rq2);   
   qingkong.addActionListener(this);   
   zh.addActionListener(this);   
   a.addItemListener(this);   
   setSize(200, 250);   
   setVisible(true);   
   try {   
    JMenuItem itemNative=new JMenuItem("系统平台风格");   
    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); // 设置界面样式   
   } catch (Exception e) {   
    e.printStackTrace();   
   }   
   setBounds(300,300,300,300);   
   setSize(220, 270);   
   setVisible(true);   
}   
  
public static void main(String[] args) {   
      
    
   计算_复杂 s = new 计算_复杂();   
   s.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);   
}   
  
public void itemStateChanged(ItemEvent event) {   
   if (event.getStateChange() == ItemEvent.SELECTED) {   
    if (a.getSelectedItem().equals("10进制转换为2进制"))   
     zz = 1;   
    if (a.getSelectedItem().equals("10进制转换为8进制"))   
     zz = 2;   
    if (a.getSelectedItem().equals("10进制转换为16进制"))   
     zz = 3;   
    if (a.getSelectedItem().equals("2进制转换为8进制"))   
     zz = 4;   
    if (a.getSelectedItem().equals("2进制转换为10进制"))   
     zz = 5;   
    if (a.getSelectedItem().equals("2进制转换为16进制"))   
     zz = 6;   
    if (a.getSelectedItem().equals("8进制转换为2进制"))   
     zz = 7;   
    if (a.getSelectedItem().equals("8进制转换为10进制"))   
     zz = 8;   
    if (a.getSelectedItem().equals("8进制转换为16进制"))   
     zz = 9;   
    if (a.getSelectedItem().equals("16进制转换为2进制"))   
     zz = 10;   
    if (a.getSelectedItem().equals("16进制转换为8进制"))   
     zz = 11;   
    if (a.getSelectedItem().equals("16进制转换为10进制"))   
     zz = 12;   
   }   
}   
  
public void actionPerformed(ActionEvent e) {   
   if (!(e.getSource() == an[3] || e.getSource() == an[7]   
     || e.getSource() == an[11] || e.getSource() == an[13]   
     || e.getSource() == an[14] || e.getSource() == an[15] || e   
     .getSource() == qingkong|| e.getSource() == zh)) {   
    if (e.getSource() == an[12]) {   
     s += e.getActionCommand();   
     char a = s.charAt(0);   
     if (a == '0') {   
      s = "0.";   
      k.setText(s);   
     }   
     else{   
      k.setText(s);   
      ff = true;   
     }   
       
     }   
      else {   
     s += e.getActionCommand();   
     k.setText(s);   
     ff = true;   
    }   
   } else {   
    if (e.getSource() == zh) {   
     if (k.getText().equals(""))   
      ;   
     else  
     {   
      jinzhi();   
      fo = 0;   
      shu1 = "";   
      s = "";   
     }   
    }   
    if (e.getSource() == qingkong) {   
     k.setText("");   
     fo = 0;   
     shu1 = "";   
     s = "";   
    }   
    if (e.getSource() == an[13]) {   
     String ss = s;   
     ss += e.getActionCommand();   
     char a = ss.charAt(0);   
     if (a == '.') {   
      s = "";   
     } else {   
      if (ss.matches("[0-9].")) {   
       s += e.getActionCommand();   
       k.setText(s);   
      }   
     }   
  
    }   
    if (ff) {   
     ff = false;   
     if (e.getSource() == an[3]) {   
      if (k.getText().equals(""))   
       ;   
      else {   
  
       if (shu1.equals("")) {   
        shu1 = k.getText();   
        k.setText("/");   
        s = "";   
        fo = 3;   
       } else {   
        shu2 = k.getText();   
        jishu(fo, shu1, shu2);   
        fo = 3;   
       }   
      }   
     }   
     if (e.getSource() == an[7]) {   
      if (k.getText().equals(""))   
       ;   
      else {   
       if (shu1.equals("")) {   
        shu1 = k.getText();   
        k.setText("*");   
        s = "";   
        fo = 7;   
       } else {   
        shu2 = k.getText();   
        jishu(fo, shu1, shu2);   
        fo = 7;   
       }   
      }   
     }   
     if (e.getSource() == an[11]) {   
      if (k.getText().equals(""))   
       ;   
      else {   
       if (shu1.equals("")) {   
        shu1 = k.getText();   
        k.setText("-");   
        s = "";   
        fo = 11;   
       } else {   
        shu2 = k.getText();   
        jishu(fo, shu1, shu2);   
        fo = 11;   
       }   
      }   
     }   
     if (e.getSource() == an[15]) {   
      if (k.getText().equals(""))   
       ;   
      else {   
       if (shu1.equals("")) {   
        shu1 = k.getText();   
        k.setText("+");   
        s = "";   
        fo = 15;   
       } else {   
        shu2 = k.getText();   
        jishu(fo, shu1, shu2);   
        fo = 15;   
       }   
      }   
     }   
     if (e.getSource() == an[14]) {   
      if (k.getText().equals("") || shu1.equals(""))   
       ff = true;   
      else {   
       shu2 = k.getText();   
       jishu(fo, shu1, shu2);   
      }   
     }   
    }   
   }   
}   
  
public void jishu(int fj, String s1, String s2) {   
   DecimalFormat twoDigits = new DecimalFormat("0.00");   
   double a, b;   
   a = Double.parseDouble(s1);   
   b = Double.parseDouble(s2);   
   switch (fj) {   
   case 3:   
    shu3 = twoDigits.format((double) (a / b));   
    k.setText(shu3);   
    break;   
   case 7:   
    shu3 = twoDigits.format((double) (a * b));   
    k.setText(shu3);   
    break;   
   case 11:   
    shu3 = twoDigits.format((double) (a - b));   
    k.setText(shu3);   
    break;   
   case 15:   
    shu3 = twoDigits.format((double) (a + b));   
    k.setText(shu3);   
    break;   
   }   
   s = "";   
   shu1 = shu3;   
   shu2 = "";   
}   
  
public void jinzhi() {   
try{   
   if (zz == 1)   
    k.setText(Integer.toBinaryString(Integer.parseInt(k.getText())));   
   else if (zz == 2)   
    k.setText(Integer.toOctalString(Integer.parseInt(k.getText())));   
   else if (zz == 3)   
    k.setText(Integer.toHexString(Integer.parseInt(k.getText())));   
   else if (zz == 4) {   
    int a = j1(k.getText(), "[0-1]+", 2);   
    k.setText(Integer.toOctalString(a));   
   } else if (zz == 5) {   
    j1(k.getText(), "[0-1]+", 2);   
  
   } else if (zz == 6) {   
    int a = j1(k.getText(), "[0-1]+", 2);   
    k.setText(Integer.toHexString(a));   
   } else if (zz == 7) {   
    int a = j1(k.getText(), "[0-7]+", 8);   
    k.setText(Integer.toBinaryString(a));   
   } else if (zz == 8) {   
    j1(k.getText(), "[0-7]+", 8);   
   } else if (zz == 9) {   
    int a = j1(k.getText(), "[0-7]+", 8);   
    k.setText(Integer.toHexString(a));   
   } else if (zz == 10) {   
    int a = j2();   
    k.setText(Integer.toBinaryString(a));   
   } else if (zz == 11) {   
    int a = j2();   
    k.setText(Integer.toOctalString(a));   
   } else if (zz == 12) {   
    j2();   
   }   
}   
catch(Exception e)   
{   
   JOptionPane.showMessageDialog(null, "检查输入的参数");   
}   
}   
  
public int j1(String zhuanhuan, String a1, int a3) {   
   if (zhuanhuan.matches(a1)) {   
    int bb, gg = 0, cc = 1;   
    String s = zhuanhuan;   
    StringBuffer ss = new StringBuffer(s);   
  
    ss.reverse();   
    for (int i = 0; i < ss.length(); i++) {   
     String jj = ss.charAt(i) + "";   
     bb = Integer.parseInt(jj);   
     if (i == 0)   
      gg += bb * cc;   
     else  
      gg += bb * (cc *= a3);   
    }   
    k.setText(gg + "");   
    return gg;   
   }   
   return 0;   
}   
  
public int j2() {   
   if (k.getText().matches("[0-9,a,b,c,d,e,f]+")) {   
    int bb, gg = 0, cc = 1;   
    String s = k.getText();   
    StringBuffer ss = new StringBuffer(s);   
    ss.reverse();   
    for (int i = 0; i < ss.length(); i++) {   
     String jj = ss.charAt(i) + "";   
     System.out.println(jj);   
     if (jj.equals("a"))   
      jj = "10";   
     if (jj.equals("b"))   
      jj = "11";   
     if (jj.equals("c"))   
      jj = "12";   
     if (jj.equals("d"))   
      jj = "13";   
     if (jj.equals("e"))   
      jj = "14";   
     if (jj.equals("f"))   
      jj = "15";   
     System.out.println(jj);   
     bb = Integer.parseInt(jj);   
     if (i == 0)   
      gg += bb * cc;   
     else  
      gg += bb * (cc *= 16);   
    }   
    k.setText(gg + "");   
    return gg;   
   }   
   return 0;   
}   
  
}