public class WhitherStringBuilder {
public String implicit(String[] fields) {
String result="";
for(int i=0;i<fields.length;i++)
result+=fields[i];
return result;
}
public String explicit(String[] fields) {
StringBuilder result=new StringBuilder();
for(int i=0;i<fields.length;i++)
result.append(fields[i]);
return result.toString();
}
}public class WhitherStringBuilder extends java.lang.Object{
public WhitherStringBuilder();
Code:
0: aload_0
1: invokespecial #1; //Method java/lang/Object."<init>":()V
4: returnpublic java.lang.String implicit(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/la
ng/String;
31: astore_2
32: iinc 3, 1
35: goto 5
38: aload_2
39: areturnpublic java.lang.String explicit(java.lang.String[]);
Code:
0: new #3; //class java/lang/StringBuilder
3: dup
4: invokespecial #4; //Method java/lang/StringBuilder."<init>":()V
7: astore_2
8: iconst_0
9: istore_3
10: iload_3
11: aload_1
12: arraylength
13: if_icmpge 30
16: aload_2
17: aload_1
18: iload_3
19: aaload
20: invokevirtual #5; //Method java/lang/StringBuilder.append:(Ljava/lang/
String;)Ljava/lang/StringBuilder;
23: pop
24: iinc 3, 1
27: goto 10
30: aload_2
31: invokevirtual #6; //Method java/lang/StringBuilder.toString:()Ljava/la
ng/String;
34: areturn}
拣一些关键步骤说一下,
我只是好奇,感谢。
public String implicit(String[] fields) {
String result="";
for(int i=0;i<fields.length;i++)
result+=fields[i];
return result;
}
public String explicit(String[] fields) {
StringBuilder result=new StringBuilder();
for(int i=0;i<fields.length;i++)
result.append(fields[i]);
return result.toString();
}
}public class WhitherStringBuilder extends java.lang.Object{
public WhitherStringBuilder();
Code:
0: aload_0
1: invokespecial #1; //Method java/lang/Object."<init>":()V
4: returnpublic java.lang.String implicit(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/la
ng/String;
31: astore_2
32: iinc 3, 1
35: goto 5
38: aload_2
39: areturnpublic java.lang.String explicit(java.lang.String[]);
Code:
0: new #3; //class java/lang/StringBuilder
3: dup
4: invokespecial #4; //Method java/lang/StringBuilder."<init>":()V
7: astore_2
8: iconst_0
9: istore_3
10: iload_3
11: aload_1
12: arraylength
13: if_icmpge 30
16: aload_2
17: aload_1
18: iload_3
19: aaload
20: invokevirtual #5; //Method java/lang/StringBuilder.append:(Ljava/lang/
String;)Ljava/lang/StringBuilder;
23: pop
24: iinc 3, 1
27: goto 10
30: aload_2
31: invokevirtual #6; //Method java/lang/StringBuilder.toString:()Ljava/la
ng/String;
34: areturn}
拣一些关键步骤说一下,
我只是好奇,感谢。
http://www.iteye.com/topic/779102