How It Works - Runtime - Java

Java (using primitives)

public class ExRuntime {
  public static void main(String[] args) {
    int a = 1 + 1;
  }
}

ExRuntime.java

// Jad home page: http://www.geocities.com/kpdus/jad.html
// Decompiler options: packimports(3) annotate 
// Source File Name:   ExRuntime.java


public class ExRuntime
{

  public ExRuntime()
  {
  //    0    0:aload_0         
  //    1    1:invokespecial   #1   <Method void Object()>
  //    2    4:return          
  }

  public static void main(String args[])
  {
    byte byte0 = 2;
  //    0    0:iconst_2        
  //    1    1:istore_1        
  //    2    2:return          
  }
}

ExRuntime.txt

Java (using Integers)

public class ExRuntime2 {
  public static void main(String[] args) {
    int a = new Integer(1).intValue() + new Integer(1).intValue();
  }
}

ExRuntime2.java

// Jad home page: http://www.geocities.com/kpdus/jad.html
// Decompiler options: packimports(3) annotate 
// Source File Name:   ExRuntime2.java


public class ExRuntime2
{

  public ExRuntime2()
  {
  //    0    0:aload_0         
  //    1    1:invokespecial   #1   <Method void Object()>
  //    2    4:return          
  }

  public static void main(String args[])
  {
    int i = (new Integer(1)).intValue() + (new Integer(1)).intValue();
  //    0    0:new             #2   <Class Integer>
  //    1    3:dup             
  //    2    4:iconst_1        
  //    3    5:invokespecial   #3   <Method void Integer(int)>
  //    4    8:invokevirtual   #4   <Method int Integer.intValue()>
  //    5   11:new             #2   <Class Integer>
  //    6   14:dup             
  //    7   15:iconst_1        
  //    8   16:invokespecial   #3   <Method void Integer(int)>
  //    9   19:invokevirtual   #4   <Method int Integer.intValue()>
  //   10   22:iadd            
  //   11   23:istore_1        
  //   12   24:return          
  }
}

ExRuntime2.txt

Remember, there is no operator overloading in Java