How to sum BigDecimal properties in java

Question

Let's get a simple example:

 Class Foo{
     private BigDecimal item1;
     private BigDecimal item2;
     private BigDecimal item3;
     private BigDecimal item4;
     private BigDecimal item5;
//setters and getters
   public BigDecimal getTotal(){
       BigDecimal total = BigDecimal.ZERO;
        if(null != item1){
            total =total .add(item1);
           }
        if(null != item2){
            total =total .add(item2);
           }
          ...
          ...
}
    }

I am summing in entity level. this is correct way or not?

can any one give me better code for getting total Value

Answer 1

Use a List<BigDecimal>

public BigDecimal getTotal(){
    List<BigDecimal> values =  Arrays.asList(item1, item2, item3, item4, item5)

    BigDecimal total = BigDecimal.ZERO;
    for (BigDecimal value : values) {
        if(value != null) {
            total = total.add(value);
        }
    }
    return total;
}

Answer 2

You can use a loop to make your code simple :

import java.util.Arrays;

...

public BigDecimal getTotal(){
   BigDecimal total = BigDecimal.ZERO; 
   for(BigDecimal bd: Arrays.asList(item1,item2,item3,item4,item5)){
        if(null != bd){
            total =total .add(bd);
           }
    }
}