- public class Ch01 {
- long s , e;
- Ch01()
- {
- s=System.currentTimeMillis();
- test2();
- e=System.currentTimeMillis();
- System.out.println("花費: "+(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 Ch01();
- }
- }
複製代碼 |