Question

I want this sentence to out like . What is wrong here because it give me
java.lang.ArrayIndexOutOfBoundsException

package first;

import org.apache.commons.lang.RandomStringUtils;


public class reverseString2 {

public static void main(String []args){



        String str = "The student so lazy";
        String[] split = str.split(" ");
        String middle = null;
        StringBuilder output = new StringBuilder();

        for (String s : split) {
            middle = s.substring(1, s.length()-1 );
            s = s.replace(middle,RandomStringUtils.random(5, middle));
            output.append(s + " ");
        }

        System.out.println(output.toString());
    }



}

Answer 1

You need to copy and paste your exact stack trace.

I wrote my own random method, because I don’t have the the best setup on this machine, and here’s what I got:

import java.util.*;
class reverseString2 {

public static void main(String []args){



        String str = "The student so lazy";
        String[] split = str.split(" ");
        String middle = null;
        StringBuilder output = new StringBuilder();

        for (String s : split) {
            middle = s.substring(1, s.length()-1 );
            s = s.replace(middle,random(5, middle));
            output.append(s + " ");
        }

        System.out.println(output.toString());
    }

    static String random(int i, String s) {
        char[] ca = s.toCharArray();
        List<Character> list = new ArrayList<Character>();
        for(char c : ca) list.add(c);
        Collections.shuffle(list);
        StringBuilder sb = new StringBuilder();
        for(Character ch : list) sb.append(ch);
        return sb.toString();
    }

}

result:

# 1:   hide   clone   input   2 seconds ago
result: success      time: 0.09s    memory: 212416 kB     returned value: 0

input: no
output:
The suntedt so lzay 

Link http://ideone.com/5flnU