- public class Ch49 {
- long s,e;
- Ch49() throws Exception
- {
- s=System.currentTimeMillis();
- test1();
- test2();
- test3();
-
-
- e=System.currentTimeMillis();
- System.out.println("use"+(e-s)+"毫秒");
-
- }
- void test1()
- {
- for(int i=1;i<=10000;i++)
- System.out.println(i);
- System.out.println();
- }
-
- void test2()
- {
- StringBuilder sb=new StringBuilder();
- for(int i=1;i<=10000;i++)
- sb.append(i+"\n");
- System.out.println(sb);
- }
- void test3()
- {
- String str="";
- for(int i=1;i<=10000;i++)
- str+=i+"\n";
- System.out.println(str);
- }
- public static void main(String[] args)
- {
- new Ch49();
- }
-
- }
複製代碼 |