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Expert:Thayanithy
The problem
A sentence can be thought of as one or more words which are delimited by spaces. For example: “A sentence is constructed with a series of words” The first word is ‘A’ The second word is ‘sentence’ There are nine words in total Java has a standard to index elements starting with 0. So the first word would be at position 0, the second word would be at position 1, etc “A sentence is constructed with a series of words”
Index 0 1 2 3 4 5 6 7 8 We need to provide a method which will insert a word into a string. The method will take the sentence to be altered, the word to be inserted and the word index location to place the word. The method will return the result as a String.
Method signature:
public static String insertWord(String sentence, String word, int position)
Example program output:
String word = “NEW”;
String sentence = “A sentence is constructed with a series of words”;
String one = insertWord(sentence,word,0);
// one would contain: “NEW A sentence is constructed with a series of words”
String two = insertWord(sentence,word,3);
// two would contain: “A sentence is NEW constructed with a series of words”
String three = insertWord(sentence,word,9);
// two would contain: “A sentence is constructed with a series of words NEW”
// in cases where the range of values is outside the possible index range,
// i.e. less than 0 or greater than the index needed for adding the word
// to the end the string. The methods should in return the string unaltered.
String two = insertWord(sentence,word,-1);
// two would contain: “A sentence is constructed with a series of words”
String three = insertWord(sentence,word,10);
// two would contain: “A sentence is constructed with a series of words”
Hint:
There are two possible solutions to the problem:
Solution one involves looking at the methods of the string class, such as charAt and substring.
The other solution would be to use the scanner class, as discussed during the lectures.
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| Answers |
Hi friend,
Code to solve the problem :
class InsertWord
{
public static String insertWord(String sentence, String word, int position)
{
String sentenceAr[] = sentence.split(" ");
String strAr[] = new String[sentenceAr.length+1];
String stringResult=" ";
if(position==0)
{
System.out.println("position : " + position);
strAr[0] = word;
stringResult +=" "+strAr[0];
for(int i=1;i<strAr.length;i++)
{
strAr[i] =sentenceAr[i-1];
stringResult +=" "+ strAr[i] + " ";
}
}
else if(position!=0)
{
for(int i=0;i<position;i++)
{
strAr[i] =sentenceAr[i];
stringResult +=" "+ strAr[i];
}
strAr[position] =word;
stringResult +=" "+ strAr[position];
for(int i=position+1;i<strAr.length;i++)
{
strAr[i] =sentenceAr[i-1];
stringResult +=" "+ strAr[i];
}
}
return stringResult;
}
public static void main(String[] args)
{
String sentence ="Hello World";
String word ="Roseindia";
int position = -1;
String sentenceAr[] = sentence.split(" ");
if(!(position>sentenceAr.length || position<0))
System.out.println(insertWord(sentence, word, position));
else
System.out.println(sentence);
}
}
Thanks
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