example.java

public class HelloWorld
{
  public HelloWorld() {}
  
  public static void main(String[] paramArrayOfString)
  {
    System.out.println(concat("233", 100));
  }
  
  public static String concat(String paramString, int paramInt) {
    String str = "";
    for (int i = 0; i < paramInt; i++) str = str + paramString;
    return str;
  }
}

example.txt

public static java.lang.String concat(java.lang.String, int);
    descriptor: (Ljava/lang/String;I)Ljava/lang/String;
    flags: ACC_PUBLIC, ACC_STATIC
    Code:
      stack=2, locals=4, args_size=2
         0: ldc           #6                  // String
         2: astore_2
         3: iconst_0
         4: istore_3
         5: iload_3
         6: iload_1
         7: if_icmpge     35
        10: new           #7                  // class java/lang/StringBuilder
        13: dup
        14: invokespecial #8                  // Method java/lang/StringBuilder."<init>":()V
        17: aload_2
        18: invokevirtual #9                  // Method java/lang/StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
        21: aload_0
        22: invokevirtual #9                  // Method java/lang/StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
        25: invokevirtual #10                 // Method java/lang/StringBuilder.toString:()Ljava/lang/String;
        28: astore_2
        29: iinc          3, 1
        32: goto          5
        35: aload_2
        36: areturn
      LineNumberTable:
        line 24: 0
        line 25: 3
        line 26: 35