java面向对象计算器

小咪咪 2022-06-16 06:23 144阅读 0赞

package classCode.practice6;

import java.util.Scanner;  
/\*\*  
 \*  
\* @ClassName: Calculator   
\* @Description: 计算器类  
\* @author  
\*  
 \*/  
public class Calculator \{

public static void main(String\[\] args) \{  
//  Operation oper;  
//  oper=OperationFactory.createOperate('+');  
//  System.out.println("请输入\_numberA:");  
//  Scanner s = new Scanner(System.in);  
//  oper.setNumberA(s.nextDouble());  
//  System.out.println("请输入\_numberB:");  
//  oper.setNumberB(s.nextDouble());  
//  double result = oper.getResult();  
//  System.out.println("结果是："+result);  
    
//    
//  Operation oper;  
//  Scanner s = new Scanner(System.in);  
//  System.out.println("请输入运算符（+ - \* /）:");  
//  String operChar = s.next();  
//  switch(operChar)\{  
//   case "+" : oper = new OperationAdd();  
//   case "-" : oper = new OperationSub();  
//   case "\*" : oper = new OperationMul();  
//   case "/" : oper = new OperationDiv();  
//   default:  
//   oper = new OperationAdd();  
//  \}  
//  System.out.println("请输入\_numberA:");  
//  oper.setNumberA(s.nextDouble());  
//  System.out.println("请输入\_numberB:");  
//  oper.setNumberB(s.nextDouble());  
//  double result = oper.getResult();  
//  System.out.println("计算结果是："+result);  
//  s.close();  
//    
//  System.out.println("请输入\_numberA:");  
//  Scanner s = new Scanner(System.in);  
//     int num1 = s.nextInt();  
//  System.out.println("请输入\_numberB:");  
//  int num2 = s.nextInt();  
//  System.out.println("请输入运算符（+ - \* /）:");  
//  String oper = s.next();  
//  switch(oper)\{  
//  case "+" : System.out.println(num1+num2);  
//  case "-" : System.out.println(num1-num2);  
//  case "\*" : System.out.println(num1\*num2);  
//  case "/" : System.out.println(num1/num2);  
//  case "%" : System.out.println(num1%num2);  
//  \}  
 \}

\--------------------------------------------------------------------

package classCode.practice6;  
/\*\*  
 \*  
 \* @ClassName: Operation   
 \* @Description: 操作类的父类  
 \*/  
public class Operation \{  
    private double numberA = 0;  
    private double numberB = 0;  
     
    public double getResult()\{  
     double result =0;  
     return result;  
    \}  
 public double getNumberA() \{  
  return numberA;  
 \}  
 public void setNumberA(double numberA) \{  
  this.numberA = numberA;  
 \}  
 public double getNumberB() \{  
  return numberB;  
 \}  
 public void setNumberB(double numberB) \{  
  this.numberB = numberB;  
 \}   
\}

\-----------------------------------------------------------

package classCode.practice6;  
/\*\*  
 \*  
 \* @ClassName: OperationAdd   
 \* @Description: 加法操作类  
 \*/  
public class OperationAdd extends Operation\{

public double getResult()\{  
  double result =0;  
  result =getNumberA()+getNumberB();  
  return result;  
 \}  
\}

\---------------------------------------------------------------------

package classCode.practice6;  
/\*\*  
 \*  
 \* @ClassName: OperationAdd   
 \* @Description: 除法操作类  
 \*/  
public class OperationDiv extends Operation\{

public double getResult()\{  
  double result =0;  
  result =getNumberA()/getNumberB();  
  return result;  
 \}  
\}

\------------------------------------------------------------

package classCode.practice6;

import java.util.Hashtable;

/\*\*  
 \*  
 \* @ClassName: OperationFactory   
 \* @Description: 操作工厂类  
 \*/  
public class OperationFactory \{  
    public static Operation createOperate(char operate)\{  
     Operation oper = null;  
     switch(operate)\{  
       
     case '+':  
      oper = new OperationAdd();  
      break;  
     case '-':  
      oper = new OperationSub();  
      break;  
     case '\*':  
      oper = new OperationMul();  
      break;  
     case '/':  
      oper = new OperationDiv();  
      break;  
     default:  
      break;  
     \}  
     return oper;  
    \}  
\}

\-----------------------------------------------------

package classCode.practice6;  
/\*\*  
 \*  
 \* @ClassName: OperationMul   
 \* @Description: 乘法操作类  
 \*/  
public class OperationMul extends Operation\{

public double getResult()\{  
  double result =0;  
  result =getNumberA()\*getNumberB();  
  return result;  
 \}  
\}

\------------------------------------------------------

package classCode.practice6;  
/\*\*  
 \*  
 \* @ClassName: OperationAdd   
 \* @Description: 减法操作类  
 \*/  
public class OperationSub extends Operation\{

public double getResult()\{  
  double result =0;  
  result =getNumberA()-getNumberB();  
  return result;  
 \}  
\}