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Today I am trying to convert String to reverse String e.g(Cat Is Running into Running Is Cat) word by word not Character

public class ReverseString_ {    public static void reverse(String str) {        String[] a = str.split(" ");        for (int i = a.length - 1; i >= 0; i--) {            System.out.println(a[i] + " ");        }    }    public static void main(String[] args) {        reverse("Cat Is Running");    }}

The following output is shown:

Running Is Cat BUILD SUCCESSFUL (total time: 0 seconds)

I am trying to convert String into reverse String same as above but through Recursion method but it seems too confusing. and display more errors. Can someone please help me understanding it. Many thanks

public static String reverse_recursion(String str) {    if (str == null)        return null;    else {        String Arry[] = str.split(" ");        int n = Arry.length - 1;        System.out.println(Arry[n] + "");        return reverse_recursion(Arry[n - 1]);    }}public static void main(String[] args) {    reverse_recursion("Cat Is Running");}

This code show following output:

RunningIsException in thread "main" java.lang.ArrayIndexOutOfBoundsException: -1

This code do not print (0) index why? can someone help me to solve this error please

Why is it throwing an error? Any help would be appreciated

public class RAWS {public String rawsc(String ori){    String temp="";    for(int i=0;i<ori.length();i++)    {        char c=ori.charAt(i);        if(((c>=65)&&(c<=90))||((c>=97)&&(c<122)))            temp=c+temp;    }    for(int i=0;i<ori.length();i++)    {        char c=ori.charAt(i);        if(((c>=65)&&(c<=90))||((c>=97)&&(c<122)))            ori.replace(c, temp.charAt(i));    }    for(int i=0;i<ori.length();i++)    {        System.out.println(ori.charAt(i));    }    return(ori);}public static void main(String[] args) {    String str="a,b$c";    RAWS ob=new RAWS();    String new1=ob.rawsc(str);    for(int i=0;i<new1.length();i++)    {        System.out.print(new1.charAt(i)+" ");    }}}

Editor:

Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String index out of range: 4 at java.lang.String.charAt(String.java:658) at arraygs.RAWS.rawsc(RAWS.java:22) at arraygs.RAWS.main(RAWS.java:30)

I need a little help. I found a question like "Write a Java program that will reverse each word of user given string without altering their position and using any built in function."

I solved a code for reversing the whole sentence, but I don't know how to solve this one. Please help me...

import java.io.*;class test25 {     public static void main(String args[]) throws IOException {         BufferedReader br = new BufferedReader(new InputStreamReader(System.in));        System.out.print("Enter string: ");        String s = br.readLine();        String reverse = "";        int length = s.length();        for (int i = length - 1; i >= 0; i--)            reverse = reverse + s.charAt(i);        System.out.println("Result:" + reverse);     } }

Hello guys i got a homework where i get a string and basically i should change the letters in it then return it backward:

A --> T

T --> A

G --> C

C --> G

Here is my code :

def dnaComplement(s):    newWord = ""    for x in s:        if x == "T":            newWord.join('A')        elif x == "A":            newWord.join('T')        elif x == "C":            newWord.join('G')        elif x == "G":            newWord.join('C')    return newWord[::-1]

the input is: ACCGGGTTTT

I tried coderbyte and looks something is wrong with it. The first challenge is simply to reverse a string. I did this in java:

import java.util.*; import java.io.*;class Main {  public static String FirstReverse(String str) {    char[] chars = str.toCharArray();    String ret = "";    for (int i = chars.length - 1; i >= 0; i--) {      ret += chars[i];    }    return ret;  }  public static void main (String[] args) {      // keep this function call here         Scanner s = new Scanner(System.in);    System.out.print(FirstReverse(s.nextLine()));   }}

It said, that three test cases had wrong output and there was the correct output. I tried running the code with the specified cases and it printed the same string as correct output for that case. So I tried resubmitting it and it said that only one test case was correct and all other had wrong out put. So I said OK and rewrote my code this way:

import java.util.*; import java.io.*;class Main {  public static String FirstReverse(String str) {    return new StringBuilder(str).reverse().toString();  }  public static void main (String[] args) {      // keep this function call here         Scanner s = new Scanner(System.in);    System.out.print(FirstReverse(s.nextLine()));   }}

Unfortunately it still says only one test case was successful... Any ideas what happened? Thanks