Java AutoIncrement Atomic Bytecode

AutoIncrementDemo.class

// javap -c -l AutoIncrementDemo

Compiled from "AutoIncrementDemo.java"
public class AutoIncrementDemo extends java.lang.Object{
public AutoIncrementDemo();
  Code:
   0:	aload_0
   1:	invokespecial	#1; //Method java/lang/Object."<init>":()V
   4:	return

  LineNumberTable: 
   line 1: 0



public static void main(java.lang.String[]);
  Code:
   0:	bipush	8
   2:	istore_1
   3:	iinc	1, 1
   6:	ldc2_w	#2; //long 3l
   9:	lstore_2
   10:	lload_2
   11:	lconst_1
   12:	ladd
   13:	lstore_2
   14:	return

  LineNumberTable: 
   line 7: 0
   line 8: 3
   line 9: 6
   line 10: 10
   line 11: 14



public static void ff0x(java.lang.String[]);
  Code:
   0:	getstatic	#4; //Field vc:I
   3:	iconst_1
   4:	iadd
   5:	putstatic	#4; //Field vc:I
   8:	return

  LineNumberTable: 
   line 14: 0
   line 15: 8



public static void ff1x(java.lang.String[]);
  Code:
   0:	getstatic	#5; //Field vb:J
   3:	lconst_1
   4:	ladd
   5:	putstatic	#5; //Field vb:J
   8:	return

  LineNumberTable: 
   line 18: 0
   line 19: 8



public static synchronized void foo();
  Code:
   0:	bipush	8
   2:	istore_0
   3:	iinc	0, 1
   6:	return

  LineNumberTable: 
   line 22: 0
   line 23: 3
   line 24: 6



public void goo();
  Code:
   0:	aload_0
   1:	dup
   2:	astore_1
   3:	monitorenter
   4:	bipush	8
   6:	istore_2
   7:	iinc	2, 1
   10:	aload_1
   11:	monitorexit
   12:	goto	20
   15:	astore_3
   16:	aload_1
   17:	monitorexit
   18:	aload_3
   19:	athrow
   20:	return
  Exception table:
   from   to  target type
     4    12    15   any
    15    18    15   any

  LineNumberTable: 
   line 27: 0
   line 28: 4
   line 29: 7
   line 30: 10
   line 31: 20



public void koo();
  Code:
   0:	aload_0
   1:	dup
   2:	astore_1
   3:	monitorenter
   4:	ldc2_w	#6; //long 8l
   7:	lstore_2
   8:	lload_2
   9:	lconst_1
   10:	ladd
   11:	lstore_2
   12:	aload_1
   13:	monitorexit
   14:	goto	24
   17:	astore	4
   19:	aload_1
   20:	monitorexit
   21:	aload	4
   23:	athrow
   24:	return
  Exception table:
   from   to  target type
     4    14    17   any
    17    21    17   any

  LineNumberTable: 
   line 34: 0
   line 35: 4
   line 36: 8
   line 37: 12
   line 38: 24



static {};
  Code:
   0:	iconst_1
   1:	putstatic	#4; //Field vc:I
   4:	lconst_1
   5:	putstatic	#5; //Field vb:J
   8:	return

  LineNumberTable: 
   line 3: 0
   line 4: 4


}

AutoIncrementDemo.java

public class AutoIncrementDemo {

    private static int vc = 1;
    private static long vb = 1L;

    public static void main(String[] args) {
        int i = 8;
        i++;
        long j = 3L;
        j++;
    }

    public static void ff0x(String[] args) {
        vc++;
    }

    public static void ff1x(String[] args) {
        vb++;
    }

    public synchronized static void foo() {
        int i = 8;
        i++;
    }

    public void goo() {
        synchronized(this) {        
            int i = 8;
            i++;
        }
    }

    public void koo() {
        synchronized(this) {        
            long j = 8;
            j++;
        }
    }
}

AutoIncrementDemo.txt

// javap -c -l AutoIncrementDemo

Compiled from "AutoIncrementDemo.java"
public class AutoIncrementDemo extends java.lang.Object{
public AutoIncrementDemo();
  Code:
   0:	aload_0
   1:	invokespecial	#1; //Method java/lang/Object."<init>":()V
   4:	return

  LineNumberTable: 
   line 1: 0



public static void main(java.lang.String[]);
  Code:
   0:	bipush	8
   2:	istore_1
   3:	iinc	1, 1
   6:	ldc2_w	#2; //long 3l
   9:	lstore_2
   10:	lload_2
   11:	lconst_1
   12:	ladd
   13:	lstore_2
   14:	return

  LineNumberTable: 
   line 7: 0
   line 8: 3
   line 9: 6
   line 10: 10
   line 11: 14



public static void ff0x(java.lang.String[]);
  Code:
   0:	getstatic	#4; //Field vc:I
   3:	iconst_1
   4:	iadd
   5:	putstatic	#4; //Field vc:I
   8:	return

  LineNumberTable: 
   line 14: 0
   line 15: 8



public static void ff1x(java.lang.String[]);
  Code:
   0:	getstatic	#5; //Field vb:J
   3:	lconst_1
   4:	ladd
   5:	putstatic	#5; //Field vb:J
   8:	return

  LineNumberTable: 
   line 18: 0
   line 19: 8



public static synchronized void foo();
  Code:
   0:	bipush	8
   2:	istore_0
   3:	iinc	0, 1
   6:	return

  LineNumberTable: 
   line 22: 0
   line 23: 3
   line 24: 6



public void goo();
  Code:
   0:	aload_0
   1:	dup
   2:	astore_1
   3:	monitorenter
   4:	bipush	8
   6:	istore_2
   7:	iinc	2, 1
   10:	aload_1
   11:	monitorexit
   12:	goto	20
   15:	astore_3
   16:	aload_1
   17:	monitorexit
   18:	aload_3
   19:	athrow
   20:	return
  Exception table:
   from   to  target type
     4    12    15   any
    15    18    15   any

  LineNumberTable: 
   line 27: 0
   line 28: 4
   line 29: 7
   line 30: 10
   line 31: 20



public void koo();
  Code:
   0:	aload_0
   1:	dup
   2:	astore_1
   3:	monitorenter
   4:	ldc2_w	#6; //long 8l
   7:	lstore_2
   8:	lload_2
   9:	lconst_1
   10:	ladd
   11:	lstore_2
   12:	aload_1
   13:	monitorexit
   14:	goto	24
   17:	astore	4
   19:	aload_1
   20:	monitorexit
   21:	aload	4
   23:	athrow
   24:	return
  Exception table:
   from   to  target type
     4    14    17   any
    17    21    17   any

  LineNumberTable: 
   line 34: 0
   line 35: 4
   line 36: 8
   line 37: 12
   line 38: 24



static {};
  Code:
   0:	iconst_1
   1:	putstatic	#4; //Field vc:I
   4:	lconst_1
   5:	putstatic	#5; //Field vb:J
   8:	return

  LineNumberTable: 
   line 3: 0
   line 4: 4


}