Listing 1: CalculatorBean.java:
package calculator;

public class CalculatorBean implements java.io.Serializable {
 
 private float result;
 
 public CalculatorBean(){ this.result = 0.0f; }
 
 public float addAB(float a, float b)
   { this.result = a+b; return result; }
   
 public float subAB(float a, float b)
   {this.result = a-b; return result; }
 
 public float mplAB(float a, float b)
   { this.result = a*b; return result;}
  
 public float divAB(float  a, float b)
   { this.result = a/b; return result; }

 public float getResult(){
   return this.result;
   }
}

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