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1 package org.jgroups.tests;
2
3
7 public class StringTest {
8 final int NUM=1000000;
9 long start, stop;
10
11 public static void main(String  [] args) {
12 new StringTest().start();
13 }
14
15 private void start() {
16 rawStringsWithObjects();
17 rawStringsWithLiterals();
18 stringBuffer();
19 }
20
21
22 private void rawStringsWithObjects() {
23 String result=null;
24 String a="a", b="b", c="c", d="d";
25 long time=System.currentTimeMillis();
26 start=System.currentTimeMillis();
27 for(int i=0; i < NUM; i++) {
28 result=a + b + c + d + "ecdsfh" + time;
29 }
30 stop=System.currentTimeMillis();
31 System.out.println("total time for rawStringsWithObjects(): " + (stop-start));
32 System.out.println("result=" + result);
33 }
34
35 private void rawStringsWithLiterals() {
36 String result=null;
37 long time=System.currentTimeMillis();
38 start=System.currentTimeMillis();
39 for(int i=0; i < NUM; i++) {
40 result="a" + "b" + "c" + "d" + "ecdsfh" + time; }
43 stop=System.currentTimeMillis();
44 System.out.println("total time for rawStringsWithLiterals(): " + (stop-start));
45 System.out.println("result=" + result);
46 }
47
48 private void stringBuffer() {
49 String result=null;
50 StringBuffer sb;
51 long time=System.currentTimeMillis();
52 start=System.currentTimeMillis();
53 for(int i=0; i < NUM; i++) {
54 sb=new StringBuffer ("a");
55 sb.append("b").append("c").append("d").append("ecdsfh").append(time);
56 result=sb.toString();
57 }
58 stop=System.currentTimeMillis();
59 System.out.println("total time for stringBuffer(): " + (stop-start));
60 System.out.println("result=" + result);
61 }
62 }
63 |
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