class Test
{
public static void main(String[] args)
{
int x; // declare x
int y=4; // declare and assign y
y++; // change y
String s; // declare s
}
}
walter@walter-s5-1030uk:~/Documents$ javap -c -l Test.class
Compiled from "Test.java"
class Test {
  Test(); // //////////// compiler-written constructor - ignore
    Code:
       0: aload_0
       1: invokespecial #1                  // Method java/lang/Object."<init>":()V
       4: return
    LineNumberTable:
      line 1: 0
    LocalVariableTable:
      Start  Length  Slot  Name   Signature
          0       5     0  this   LTest; // end constructor ///////////////////////

  public static void main(java.lang.String[]);
    Code: // bytecode of main starts here
       0: iconst_4 // get 4
       1: istore_2 // store in 2 - so y=4
       2: iinc          2, 1 // increment value at 2 - so y++
       5: return 	// the end
    LineNumberTable:
      line 6: 0
      line 7: 2
      line 9: 5
    LocalVariableTable: // teh local variables and parameter
      Start  Length  Slot  Name   Signature
          0       6     0  args   [Ljava/lang/String; // String[] args
          2       4     2     y   I	// y, an int, starts at 2, 4 bytes long
}