java/js 分割 java/js翻转

js分割：

var s='我1234567890我1234567890我1234567890我1234567890我1234567890我1234567890',
reg=/.{4}/g,
rs=s.match(reg);
rs.push(s.substring(rs.join('').length));
alert(rs)

java分割： 

public static String[] split(String msg, int num) {
  num = num + 1;
        int len = msg.length(); 
        if (len <= num) 
          return new String[] {msg}; 
        int count = len / (num - 1); 
        count += len > (num - 1) * count ? 1 : 0;   //这里应该值得注意  
        String[] result = new String[count]; 
        int pos = 0; 
        int splitLen = num-1; 
        for (int i = 0; i < count; i++) { 
          if (i == count - 1) 
            splitLen = len - pos; 
          result[i]  = msg.substring(pos,  pos+ splitLen); 
          pos += splitLen; 
        } 
        return result; 
    } 

js翻转：

var testString = "1234567爱上8.。";
var testString=testString.split("").reverse().join("");

java翻转

public void convertStr(String str){ 
        //将String 对象转换为可改变的StringBuffer类对象 
        //然后调用StringBuffer类的reverse()方法实现反转 
        String strReverse=new StringBuffer(str).reverse().toString(); 
        System.out.println(strReverse); 
     
    }