$ cat Foo.java
class Foo {
String foo(String[] ss) {
String buf = "";
for (int i = 0; i < ss.length; ++i) {
buf += ss[i];
}
return buf;
}
}
$ javac Foo.java
$ javap -c Foo
Compiled from "Foo.java"
class Foo extends java.lang.Object{
Foo();
Code:
0: aload_0
1: invokespecial #1; //Method java/lang/Object."<init>":()V
4: return
java.lang.String foo(java.lang.String[]);
Code:
0: ldc #2; //String
2: astore_2
3: iconst_0
4: istore_3
5: iload_3
6: aload_1
7: arraylength
8: if_icmpge 38
11: new #3; //class java/lang/StringBuilder
14: dup
15: invokespecial #4; //Method java/lang/StringBuilder."<init>":()V
18: aload_2
19: invokevirtual #5; //Method java/lang/StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
22: aload_1
23: iload_3
24: aaload
25: invokevirtual #5; //Method java/lang/StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
28: invokevirtual #6; //Method java/lang/StringBuilder.toString:()Ljava/lang/String;
31: astore_2
32: iinc 3, 1
35: goto 5
38: aload_2
39: areturn
}