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| Java programming 1 |
Expert:Kaito
write one program, which consists of a main method and an insertWord() method.
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”
HI sir, let say if wanna use scanner class to solve the above program, how can it be done? |
| 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);
}
}
For more information on Java visit to :
http://www.roseindia.net/java/
Thanks
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