package comnf147Package;
import java.util.ArrayList;
import java.util.List;
public class String_Test {
public static void main(String[] args) {
long n = 1000000;
long startTime=System.currentTimeMillis();
List thread = new ArrayList();
{
StringBuffer sb=new StringBuffer();
thread=new ArrayList<>();
for (int i = 0; i < n ; i++) {
Thread t=new Thread();
thread.add(t);
sb.append(“.”);
}
long endTime=System.currentTimeMillis();
System.out.println(“Buff 《一线大厂Java面试题解析+后端开发学习笔记+最新架构讲解视频+实战项目源码讲义》无偿开源 威信搜索公众号【编程进阶路】 er”+(endTime - startTime)/1000.0+“ms”);
}
{
StringBuilder sb=new StringBuilder();
thread=new ArrayList<>();
for (int i = 0; i < n ; i++) {
Thread t=new Thread();
thread.add(t);
sb.append(“.”);
}
long endTime=System.currentTimeMillis();
System.out.println(“Builder”+(endTime - startTime)/1000.0+“ms”);
}
{
String str;
