Wrapper Class Vs Primitive types Output 1

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public class Tester {

  public static void main(String[] args) {

     Integer sum1 = 125; //line 1
    int sum2 = 125; //line 2
    System.out.print(sum1.equals(sum2)); //line 3
    System.out.print(sum2.equals(sum1)); //line 4
    System.out.print(sum1==sum2); //line 5

  }

 }

 Output:

 1. Compilation error at line 3 
2. Compilation error at line 4 
3. truetruefalse 
4. truetrueture

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