Word manipulation

[Roadie]

I have to write a java program to take in sentence and then output the number of valid words, the longest word, how many times it occurred, the shortest word and how many times that occurred.. What I want to do is create methods for processing each of those and then have the main to ask for the sentence and output the results. Can anyone help?

[Ganon11]

What do you have so far? You've given us your ideas...now, how do you think you'll accomplish the first function? The second?

Show us what you've tried, and we'll help guide you to the answer that way.

[r035198x]

I have to write a java program to take in sentence and then output the number of valid words, the longest word, how many times it occurred, the shortest word and how many times that occurred.. What I want to do is create methods for processing each of those and then have the main to ask for the sentence and output the results. Can anyone help?

How are you going to determine which word is valid and which one is not? What code have you written so far?

[Roadie]

What do you have so far? You've given us your ideas...now, how do you think you'll accomplish the first function? The second?

Show us what you've tried, and we'll help guide you to the answer that way.

class CountValidWords
{
	public static boolean isValid(String theString)	
	
	{
		boolean validWord ;
		int index ;
		
		validWord = true ;
		index = 0 ;
		while ( (index < theString.length()) && (validWord == true) )
			{
				if(((theString.charAt(index) >= 'A') && (theString.charAt(index) <= 'Z')) || ((theString.charAt(index) >= 'a') && (theString.charAt(index) <= 'z')))
					{
						index ++ ;
					}
				else
					{
						validWord = false ;
					}		
			}
		
		return validWord ;	
	
	}
	
    public static void main(String[] args)
    
    {
    	String theWord ;
    	String  sentence ;
    	int fin ;
    	int st ;
    	int numOfSpaces = 0 ;
    	int numOfWords = 0 ;
    	int numOfValidWords = 0 ;
    	
    	System.out.print ("\n\n\t Please enter a sentence: \t") ;
    	System.out.print ("\n\n\t ") ;
    	sentence = EasyIn.getString() + " " ;
    	st = 0 ;
    	fin = sentence.indexOf(' ') ;
    	
    	
    	
    	while(fin != -1)
    	{
    		theWord = sentence.substring(st,fin) ;
    		
    		if(isValid(theWord) == true)
    		{
    			numOfValidWords ++ ;
    		}
    		
    		st= fin + 1 ;
    		fin = sentence.indexOf(' ',st) ;
    	}	
    	
    	System.out.print( "\n\n\t there are " + numOfValidWords + " Valid words in this sentence") ;
    	System.out.print( "\n\n\t") ;
    }
    
}

This is how I count valid words. I don't even know where to start with the rest - I've hit a complete blank. I know i have to use a loops to get the program to check the length of the word and then store it if its longer than the previous longestword or ++ the count if its the same.

[Roadie]

class LongestWord
{
	public void String (String longestWord)
	{
		String sentence = "this is a test" ;
		String theWord ;
		longestWord = "" ;
		int index = 0 ;
		
		while (index < sentence.length())
			if (theWord.length() >> longestWord)
			{
				longestWord = theWord ;
			}
	}
	
	public static int occLongestWord(int occLongestWord)
	{
		String theWord ;
		String longestWord ;
		occLongestWord = 0 ;
			
		if (theWord == longestWord)
		{
			occLongestWord ++ ;
		}
		return occLongestWord ;
	}
	
    public static void main(String[] args)
	{
		String sentence = "This is a test" ;
		
	    System.out.print ("\n\n\tThe longest word occurs " + occLongestWord + " times.") ;
	    System.out.print ("\n\n\t") ;
	}
    
}

This is what I've got so far on the longest word part. I know there's alot wrong with it but its where I'm at at the moment. I appreciate any help you can give me. I'm writing the program for a project but I'm now more interested in understanding everything that getting it done. I'm gonna have to go back to the basics and start again. I find it hard though to find any material thats not extremely confusing. Its a shame because I really like java

[r035198x]

Your program design is a little difficult to follow. Spilt the string into a strin array first and call some methods that do what you want. Here is how you should have started

 
public static void main(String[] args) {
  String sentence = EasyIn.getString();
  String words = sentence.split(" "); //splits a given string using space into a strin array
  System.out.println("Number of spaces is :"+numOfSpaces(sentence));
  System.out.println("Longest word is :"+longestWord(words));
 }
 //tells us the longest word in an array of words
 public static String longestWord(String[] words) {
  String s = "";
  for(String a : words) {
   if(a.length() > s.length()) {
	s = a;
   }
  }
  return s;
 }

 //Tells us the number of spaces in a string
 public static int numOfSpaces(String s) {
  int num = 0;
  for(int i = 0;i < s.length()i ++) {
   if(s.charAt(i).equals(" ")) {
	num++;
   }
  }
  return num;
 }

[Roadie]

Your program design is a little difficult to follow. Spilt the string into a strin array first and call some methods that do what you want. Here is how you should have started

 
public static void main(String[] args) {
  String sentence = EasyIn.getString();
  String words = sentence.split(" "); //splits a given string using space into a strin array
  System.out.println("Number of spaces is :"+numOfSpaces(sentence));
  System.out.println("Longest word is :"+longestWord(words));
 }
 //tells us the longest word in an array of words
 public static String longestWord(String[] words) {
  String s = "";
  for(String a : words) {
   if(a.length() > s.length()) {
	s = a;
   }
  }
  return s;
 }

 //Tells us the number of spaces in a string
 public static int numOfSpaces(String s) {
  int num = 0;
  for(int i = 0;i < s.length()i ++) {
   if(s.charAt(i).equals(" ")) {
	num++;
   }
  }
  return num;
 }

Thanks for replying! Really appreciate it. I actually haven't done anything with arrays yet so I've no understanding of them at all. That looks so simple..

when I put it into m IDE I got

" ';' expected "

for this line

 for(int i = 0;i < s.length()i ++) {

so i put in the ';' and then I got

char cannot be dereferenced

for

if(s.charAt(i).equals(" ")) {

&

incompatible types

for

String words = sentence.split(" ");

&

longestWord(java.lang.String[]) in x cannot be applied to (java.lang.String)

for

System.out.println("Longest word is :"+longestWord(words));

[r035198x]

Thanks for replying! Really appreciate it. I actually haven't done anything with arrays yet so I've no understanding of them at all. That looks so simple..

when I put it into m IDE I got

" ';' expected "

for this line

 for(int i = 0;i < s.length()i ++) {

so i put in the ';' and then I got

char cannot be dereferenced

for

if(s.charAt(i).equals(" ")) {

&

incompatible types

for

String words = sentence.split(" ");

&

longestWord(java.lang.String[]) in x cannot be applied to (java.lang.String)

for

System.out.println("Longest word is :"+longestWord(words));

Yaccck. What a mess of code I just posted. Please kindly adjust to

 
import java.util.Scanner;
public class Test1 {
 public static void main(String[] args) {
  Scanner input = new Scanner(System.in);
  System.out.print("Enter the sentence :");
  String sentence = input.nextLine();
  String[] words = sentence.split(" "); //splits a given string using space into a strin array
  System.out.println("Number of spaces is :"+numOfSpaces(sentence));
  System.out.println("Longest word is :"+longestWord(words));
 }
 //tells us the longest word in an array of words
 public static String longestWord(String[] words) {
  String s = "";
  for(String a : words) {
   if(a.length() > s.length()) {
	s = a;
   }
  }
  return s;
 }
 //Tells us the number of spaces in a string
 public static int numOfSpaces(String s) {
  int num = 0;
  for(int i = 0;i < s.length();i++) {
   if(s.charAt(i) == ' ') {
	num++;
   }
  }
  return num;
 }
}

[Roadie]

Yaccck. What a mess of code I just posted. Please kindly adjust to

 
import java.util.Scanner;
public class Test1 {
 public static void main(String[] args) {
  Scanner input = new Scanner(System.in);
  System.out.print("Enter the sentence :");
  String sentence = input.nextLine();
  String[] words = sentence.split(" "); //splits a given string using space into a strin array
  System.out.println("Number of spaces is :"+numOfSpaces(sentence));
  System.out.println("Longest word is :"+longestWord(words));
 }
 //tells us the longest word in an array of words
 public static String longestWord(String[] words) {
  String s = "";
  for(String a : words) {
   if(a.length() > s.length()) {
	s = a;
   }
  }
  return s;
 }
 //Tells us the number of spaces in a string
 public static int numOfSpaces(String s) {
  int num = 0;
  for(int i = 0;i < s.length();i++) {
   if(s.charAt(i) == ' ') {
	num++;
   }
  }
  return num;
 }
}

Thank you very much sir! I handed in my project earlier this morning with what I had done already but more importantly I understand how to do it now. Hopefully I'll be able to help someone else further down the line..

[r035198x]

Thank you very much sir! I handed in my project earlier this morning with what I had done already but more importantly I understand how to do it now. Hopefully I'll be able to help someone else further down the line..

I hope whatever you submitted worked.

[Roadie]

I hope whatever you submitted worked.

Yeah it did but it wasn't everything i was supposed to have done. Better than handing in nothing.. Again I really appreciate the help!