I wrote same program but showing error, please review

#1

import java.util.ArrayList;
public class Main
{
static void printsub(String str,String res)
{
if(str.length()==0)
System.out.print(res +"" , “”);

    printsub(str.substring(1),res);
    printsub(str.substring(1),res+str.charAt(0));
}
public static void main(String[] args) 
{
	printsub("abc","");
}

}

#2

@tishachhabra2702_8fc5a68a2e295e35 In the basecase when str.length()==0 you have to print the result and return from the function otherwise you will get IndexOutOfBound Exception. So in the base add a return statement. One more thing that you have to do is Your SysO statement is not correct due to two times Double quote. So write like this :

Corrected Code :

import java.util.ArrayList;
public class Main
{
static void printsub(String str,String res)
{
if(str.length()==0){
System.out.print(res+", ");
return;
}

    printsub(str.substring(1),res);
    printsub(str.substring(1),res+str.charAt(0));
}
public static void main(String[] args) 
{
	printsub("abc","");
}
}
#3

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