finalのやつ

final.txt

public class Hoge {
  public static void main(String[] args) throws Exception {
      Hoge hoge = new Hoge();
      System.out.println(hoge.doHoge());
      return;
  }

  public int doHoge(){
      final int a = 1;
      final int b = 1;
      return a + b;
  }
}

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

  public static void main(java.lang.String[]) throws java.lang.Exception;
    Code:
       0: new           #2                  // class Hoge
       3: dup           
       4: invokespecial #3                  // Method "<init>":()V
       7: astore_1      
       8: getstatic     #4                  // Field java/lang/System.out:Ljava/io/PrintStream;
      11: aload_1       
      12: invokevirtual #5                  // Method doHoge:()I
      15: invokevirtual #6                  // Method java/io/PrintStream.println:(I)V
      18: return        

  public int doHoge();
    Code:
       0: iconst_2      
       1: ireturn       
}


public class Hugo {
  public static void main(String[] args) throws Exception {
      Hugo hugo = new Hugo();
      System.out.println(hugo.doHugo());
      return;
  }

  public int doHugo(){
      int a = 1;
      int b = 1;
      return a + b;
  }
}

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

  public static void main(java.lang.String[]) throws java.lang.Exception;
    Code:
       0: new           #2                  // class Hugo
       3: dup           
       4: invokespecial #3                  // Method "<init>":()V
       7: astore_1      
       8: getstatic     #4                  // Field java/lang/System.out:Ljava/io/PrintStream;
      11: aload_1       
      12: invokevirtual #5                  // Method doHugo:()I
      15: invokevirtual #6                  // Method java/io/PrintStream.println:(I)V
      18: return        

  public int doHugo();
    Code:
       0: iconst_1      
       1: istore_1      
       2: iconst_1      
       3: istore_2      
       4: iload_1       
       5: iload_2       
       6: iadd          
       7: ireturn       
}

ver2.txt

public class Final {
public static void main(String[] args) {
        final int NUM = 31;
        for (int i = 0; i < Integer.MAX_VALUE; i++) {
                int hash = 17;
                hash = hash * NUM + i;
                hash = hash * NUM + i;
                hash = hash * NUM + i;
                hash = hash * NUM + i;
                hash = hash * NUM + i;
        }
}
}

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

  public static void main(java.lang.String[]);
    Code:
       0: iconst_0      
       1: istore_2      
       2: iload_2       
       3: ldc           #2                  // int 2147483647
       5: if_icmpge     52
       8: bipush        17
      10: istore_3      
      11: iload_3       
      12: bipush        31
      14: imul          
      15: iload_2       
      16: iadd          
      17: istore_3      
      18: iload_3       
      19: bipush        31
      21: imul          
      22: iload_2       
      23: iadd          
      24: istore_3      
      25: iload_3       
      26: bipush        31
      28: imul          
      29: iload_2       
      30: iadd          
      31: istore_3      
      32: iload_3       
      33: bipush        31
      35: imul          
      36: iload_2       
      37: iadd          
      38: istore_3      
      39: iload_3       
      40: bipush        31
      42: imul          
      43: iload_2       
      44: iadd          
      45: istore_3      
      46: iinc          2, 1
      49: goto          2
      52: return        
}


public class NotFinal {
public static void main(String[] args) {
        int NUM = 31;
        for (int i = 0; i < Integer.MAX_VALUE; i++) {
                int hash = 17;
                hash = hash * NUM + i;
                hash = hash * NUM + i;
                hash = hash * NUM + i;
                hash = hash * NUM + i;
                hash = hash * NUM + i;
        }
}
}

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

  public static void main(java.lang.String[]);
    Code:
       0: bipush        31
       2: istore_1      
       3: iconst_0      
       4: istore_2      
       5: iload_2       
       6: ldc           #2                  // int 2147483647
       8: if_icmpge     50
      11: bipush        17
      13: istore_3      
      14: iload_3       
      15: iload_1       
      16: imul          
      17: iload_2       
      18: iadd          
      19: istore_3      
      20: iload_3       
      21: iload_1       
      22: imul          
      23: iload_2       
      24: iadd          
      25: istore_3      
      26: iload_3       
      27: iload_1       
      28: imul          
      29: iload_2       
      30: iadd          
      31: istore_3      
      32: iload_3       
      33: iload_1       
      34: imul          
      35: iload_2       
      36: iadd          
      37: istore_3      
      38: iload_3       
      39: iload_1       
      40: imul          
      41: iload_2       
      42: iadd          
      43: istore_3      
      44: iinc          2, 1
      47: goto          5
      50: return        
}

ループごとにじゃない、演算ごとにだ。