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In this core java programming tutorial we will write a program to Reverse words in sentence in java.
Q. Write a program to reverse words in sentence in java.
Example>
Original String : i am doing good
String after reversing words in sentence : good doing am i
Full Program/SourceCode/ Example to Reverse words in sentence in java >
package level2;
/** Copyright (c), AnkitMittal www.JavaMadeSoEasy.com */
public class ReverseWordsInSentenceExample {
public static void main(String[] args) {
String inputString="i am doing good";
System.out.println("Original String : "+inputString);
System.out.print("String after reversing words in sentence : ");
System.out.println(reverseWordsInSentence(inputString));
}
public static char[] reverseWordsInSentence(String inputString){
char inputAr[]=inputString.toCharArray();
char outputAr[]=new char[inputString.length()];
int spacePos=0,subStringLength=0;
int outputArIndex=0;
for(int inputArIndex=inputAr.length-1;inputArIndex>=0;inputArIndex--){ //strat iterating from last position
if(inputArIndex==0){ //if we have reached starting index of inputAr.
while(!String.valueOf(inputAr[inputArIndex]).equals(" ")){ //start iterating from start, as soon as you find space exit while loop.
outputAr[outputArIndex++]=inputAr[inputArIndex++];
}
return outputAr;
}
if( String.valueOf(inputAr[inputArIndex]).equals(" ")){ //we have found space.
spacePos=inputArIndex; //store space position found in variable.
subStringLength=inputAr.length-1-spacePos; //calculate length of substring we have found
while(outputArIndex<subStringLength){
outputAr[outputArIndex++]=inputAr[++spacePos];
}
outputAr[outputArIndex++]=' '; //inserting space at last and then incrementing outputArIndex
}
}
return outputAr;
}
}
/*OUTPUT
Original String : i am doing good
String after reversing words in sentence : good doing am i
*/
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So in this core java programming tutorial we learned how to write a program to Reverse words in sentence in java.
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