模拟String.subString()

package com.xyj.java.t_4_last;public class TestSub {public static void main(String[] args) {// TODO Auto-generated method stubString str = "奋斗吧骚年!";strSub(str, 1, 5);}//此方法模拟String类中的substring方法//str 传入的字符串//begin 开始截取位置//end  结束截取位置private static void strSub(String str, int begin, int end) {char[] charArr = str.toCharArray();StringBuffer newStr = new StringBuffer();//System.out.println(newStr);for (; begin < end; begin++) {newStr.append(charArr[begin]);}System.out.println(newStr);}}