tyson記事本

public class Test{
public static void main(String[] args){
new Test();
}

public Test(){
System.out.println("normal converting (ms): " + normal());
System.out.println("algorithm converting (ms): " + algo());
}

public long normal(){
int a = 0;
String b = null;
long st = System.currentTimeMillis();
for (int i = 0; i < 2000000; i++){
b = a + "";
}
long et = System.currentTimeMillis();
return (et - st);
}

public long algo(){
int a = 0;
String b = null;
long st = System.currentTimeMillis();
for (int i = 0; i < 2000000; i++){
b = Integer.toString(a);
}
long et = System.currentTimeMillis();
return (et - st);
}
}