Sum Array Specific Object In Java Spring-CodePudding

How can i sum the spesific array in java here my respon json.

{
      "ResponA": {
        "SumA": "1000000"
      },
      "Respon B": [
      {
        "PaymentB": "Tax 2021",
        "SumB": "50"
      },
      {
        "PaymentB": "Tax 2020",
        "SumB": "20"
      }
      ],
    
      "ResponC": [
      {
        "PaymentC": "groceries 2020",
        "SumC": "10"
      },
      {
        "PaymentC": "groceries 2021",
        "SumC": "20"
      }
      ]
    }

i want to sum "Respon A All Array Respon B All Array Respon C"

and heres my code for getting the json respon.

String ResponA = respon.getBody().ResponA().SumA();
String ResponB = respon.getBody().ResponB().get(0).SumB();
String ResponC = respon.getBody().ResponC().get(0).SumC();

CodePudding user response：

There are min 2 things you need to do to get the answer there. Things you need to know is

How to iterate a list (for loops or streams in this case)
How to convert String to Integer (Integer.parseInt(String))
extra, when you define variables in Java use camelCase, as this is the standard.

using above mentioned things. You should be able to calculate the sum. Following is kind of a pseudo code for your problem.

int total = 0;
total = convert responA string to int(Integer.parseInt(responA))   total;
//write a for each loop to calculate ResponB values
for (ResponB res: respon.getBody().ResponB()){
   total = total   Integer.parseInt(res.sumB());
}
//write another for each loop to calculate ResponC values
for each (ResponC res: respon.getBody().ResponC()){
   total = total   Integer.parseInt(res.sumC());
}
//now you have. the total
System.out.println(total);