2020.02.17 String常用类练习题

package com.guoyun.StirngTest;

/**
 * ClassName:
 * Function:  ADD FUNCTION
 * Reason:   ADD REASON
 *
 * @author
 * @Date
 * @since Ver 1.1
 */
public class Test1 {
    public static void main(String[] args) {
        String str="多彩";
        String str1="贵州";

        String str2=str+str1;
        String str3="多彩贵州";
        System.out.println(str3.indexOf(-1));
        String str4=new String("贵州");
        System.out.println(str3==str2.intern());
        int x [] = new int[8];
        System .out .println(x [1]);
        String str5="abc";
        str5+="d";
        int l=str5.length();
        System.out.println(str5+"  "+l);
        String str6="123";
        //将字符串转化为int
        int num=Integer.parseInt(str6);
        Integer num1=new Integer(str6);
        int num2=Integer.valueOf(str6);
        StringBuffer buffer=new StringBuffer("abc");
        System.out.println(buffer.reverse());
    }
}

2020.02.17 String常用类练习题

原文：https://www.cnblogs.com/aojie/p/12323441.html