Read a line of text and reverse each word do not use StringTokenizer

[harish thiru]

I have tried a lot but i am not able to remove the ArrayIndexOutOfBounds Exception at runtime but it compiles just fine

import java.util.*;
public class Rev {
static void rev(String jik){ //method to reverse the given string
int i,j;
char ji[]=new char[jik.length()];

for(i=0,j=jik.length();i<jik.length()&&j>=0;j--){
ji[i]=jik.charAt(j);
i++;
}
String jk=ji.toString();

System.out.println(jk+" ");
}
public static void main(String[] arg){
int i,start,fin;
start=0;

String str;
Scanner in = new Scanner(System.in);
str=in.nextLine();
for(i=0;i<str.length();i++){
if(str.charAt(i)==' '){
fin=i-1;
String ut=str.substring(start, fin);
rev(ut);
start=i+1;

}


}
}
}

>

[Vt Guru]

  
String a="test";
char one[]=a.toCharArray(); 
cahr two[]=new char[one.length];
for(int i=0,j=one.length-1;i<one.length&&j>0;i++,j--){
two[i]=own[j];
}
  

[Ankit Garg]

Hi Harish! Welcome to javaranch.

Vinoth gave a perfect code to implement what you want. Although this is a small thing but I want to point this out. You can convert the char array back into string using the string constructor. Also there is a small typo in vinoth's program so lemme give you the code again

String a="test";
char one[]=a.toCharArray(); 
cahr two[]=new char[one.length];
for(int i=0,j=one.length-1;i<one.length&&j>0;i++,j--){
two[i]=one[j];   //typo removed :)
}
String b = new String(two);

[harish thiru]

thanks dude for both of your help but now i am not getting output though exceptions are not coming

import java.util.*;
public class Rev {
static void rev(String jik){
int i,j;

char one[]=jik.toCharArray();
char two[]=new char[one.length];
for(i=0,j=one.length-1;i<one.length&&j>0;i++,j--){
two[i]=one[j];
}
String b = new String(two);

System.out.print(b+" ");
}
public static void main(String[] arg){
int i,start,fin;
start=0;

String str;
Scanner in = new Scanner(System.in);
str=in.nextLine();
for(i=0;i<str.length();i++){
if(str.charAt(i)==' '){
fin=i-1;
String ut=str.substring(start, fin);
rev(ut);
start=i+1;

}


}
}
}


>

[Campbell Ritchie]

I don't thin k you have helped him at all, I am afraid. Simply giving a solution means he hasn't worked out things for himself and doesn't know why the Exception occurred.

[harish thiru]

hey ritchie i understood why exception occurred because i used jik.length() and not jik.length()-1 for j initialisation

String a="test";
char one[]=a.toCharArray();
cahr two[]=new char[one.length];
for(int i=0,j=one.length-1;i<one.length&&j>=0;i++,j--){ it shud be j>=0; anyway thnks dude
two[i]=own[j];
}

[Campbell Ritchie]