calculateresultbean.java

java EJB 编程源代码。

package calculatebean;

import java.awt.*;
import javax.swing.JLabel;

/**
 *  这个Bean是用来处理计算的，并且返回计算结果
 */

public class CalculateResultBean extends JLabel
{
  BorderLayout borderLayout1 = new BorderLayout();
  private String calculateValue;

  public CalculateResultBean()
  {
    try
    {
      jbInit();
    }
    catch(Exception ex)
    {
      ex.printStackTrace();
    }
  }
  private void jbInit() throws Exception
  {
    this.setLayout(borderLayout1);
  }
  public void setCalculateValue(String calculateValue,int X_value,int Y_value)
  {
    /* 计算设置器的实现 */

    int caresult1 = 0;
    double caresult2 = 0;
    String CaResult = null;

    if(calculateValue.equals("+"))
      {
       CaResult = Integer.toString(X_value);
       CaResult = CaResult + " + " + Integer.toString(Y_value);
       caresult1 = X_value + Y_value;  // 做加法运算
       CaResult = CaResult + " = " + Integer.toString(caresult1);
      }
    if(calculateValue.equals("-"))
      {
       CaResult = Integer.toString(X_value);
       CaResult = CaResult + " - " + Integer.toString(Y_value);
       caresult1 = X_value - Y_value;  // 做减法运算
       CaResult = CaResult + " = " + Integer.toString(caresult1);
      }
    if(calculateValue.equals("*"))
      {
       CaResult = Integer.toString(X_value);
       CaResult = CaResult + " * " + Integer.toString(Y_value);
       caresult1 = X_value * Y_value;  // 做乘法运算
       CaResult = CaResult + " = " + Integer.toString(caresult1);
      }
    if(calculateValue.equals("/"))
      {
      if(Y_value == 0)
        {
         // 如果除数为0
         CaResult = Integer.toString(X_value);
         CaResult = CaResult + " / " + Integer.toString(Y_value);
         CaResult = CaResult + " = ∞";
        }
      else
        {
         // 如果除数不为0
         CaResult = Integer.toString(X_value);
         CaResult = CaResult + " / " + Integer.toString(Y_value);
         caresult2 = (double)X_value / Y_value;   // 做除法运算
         CaResult = CaResult + " = " + Double.toString(caresult2);
        }
      }
    this.calculateValue = CaResult;
  }
  public String getCalculateValue()
  {
    /* 计算获取器的实现 */
    return calculateValue;
  }
}