Java; a program that reads a phrase and displays the words in the reverse order

you can pass it to an array, then traverse it from the end to the beginning so that it collects the last chains and is concatenated:

import java.util.*;
import java.lang.*;

class Rextester
{  
    public static void main(String args[])
    {
        String cadena="hola como estas";
        String [] array=cadena.split(" ");
        String invertido="";
        for(int i=array.length-1;i>=0; i--){
           invertido=invertido+" "+array[i];
        }
        System.out.println(invertido);
    }
}

With JAVA 8:

import java.util.ArrayDeque;
import java.util.stream.Collectors;
import java.util.stream.Stream;

class Main {
  public static void main(String[] args) {
        Stream.of("hola que mas".split(" "))
            .collect(Collectors.toCollection(ArrayDeque::new))
            .descendingIterator()
            .forEachRemaining(System.out::println);
    }
}

  

hello what else > more than hello

Demo

You can create an array from the original string to get the words:

 String frase = "Me gusta programar.";
 String[] strWords =  frase.split(" ");

later invert the values of the array

   List<String> list = Arrays.asList(strWords);
   Collections.reverse(list);

in this way build the required string.

Example:

    String  resultado ="";
    String frase = "Me gusta programar.";
    String[] strWords =  frase.split(" ");
    List<String> list = Arrays.asList(strWords);
    Collections.reverse(list);

    for (String part : list) {
        resultado += part + " ";
    }
    System.out.println(resultado);

to get as output:

programar. gusta Me 

I add an online example .

There are two ways to do that in java, the first one is like this:

String sCadena = "LineaDeCodigo";

for (int x=sCadena.length()-1;x>=0;x--)
		sCadenaInvertida = sCadenaInvertida + sCadena.charAt(x);
    System.out.println(sCadenaInvertida);

and the other way in which you can use a java method and make it easier is as follows:

We define the String and load it into the StringBuffer:

String cadena= "abuelita, abuelita";
StringBuilder builder=new StringBuilder(cadena);

We execute the .reverse () of the StringBuffer and convert the StringBuffer into a string using the .toString () method

String sCadenaInvertida=builder.reverse().toString();

Something very simple and clean in your code.