calculator.java

计算器,简单的几个功能,希望大家多指教.

package com.hippo;

public class Calculator {
	private String first; //第一个操作数
	private String second;  //第二个操作数
	private double result; //操作结果
	private String operator; //操作符
	
	public void setFirst(String first)
	{
		this.first=first;
	}
	public void setSecond(String second)
	{
		this.second=second;
	}
	public void setOperator(String operator)
	{
		this.operator=operator;
	}
	public String getFirst()
	{
		return this.first;
	}
	public String getSecond()
	{
		return this.second;
	}
	public String getOperator()
	{
		return this.operator;
	}
	//获得计算结果
	public double getResult()
	{
		return this.result;
	}
	
	public void calculate()
	{
		double one=Double.parseDouble(first);
		double two=Double.parseDouble(second);
		try
		{
			if(operator.equals("+")) result=one+two;
			else if(operator.equals("-")) result=one-two;
			else if(operator.equals("*")) result=one*two;
			else if(operator.equals("/")) result=one/two;
		}
		catch(Exception e)
		{
			System.out.print(e);
		}
	}

}