Java Question... The following program using a generic class ItemCount to count

Question

Java Question...

The following program using a generic class ItemCount to count the number of times the same word is read from the user input. Modify the program to:

Complete the incrementIfDuplicate() method and update the main() method within the DuplicateCounter class to use the incrementIfDuplicate() method.

Modify the program to count the number of times to a specific integer value is read from the user input. Be sure to use the Integer class.

import java.util.Scanner;

public class DuplicateCounter {
public static void main(String[] args) {
Scanner scnr = new Scanner(System.in);
ItemCount<String> wordCounter = new ItemCount<String>();
String inputWord = "";
  
wordCounter.setItem("that");

System.out.println("Enter words (END at end):");

// Read first word
inputWord = scnr.next();
  
// Keep reading until word read equals <end>
while( !inputWord.equals("END") ) {
if (wordCounter.getItem().compareTo(inputWord) == 0) {
wordCounter.incrementCount();
}

// Read next word
inputWord = scnr.next();
}

// Display final word count
System.out.println("The word "" + wordCounter.getItem() +
"" was read " + wordCounter.getCount() +
" times.");

return;
}
}

public class ItemCount <Type extends Comparable<Type>> {
private Type itemVal; // Value for item
private int itemCount; // Count for item

// Set item value, and reset item count to 0
public void setItem(Type newItemVal) {
itemVal = newItemVal;
itemCount = 0;
}

// Get item value
public Type getItem() {
return itemVal;
}

// Get item count
public int getCount() {
return itemCount;
}

// Reset item count to 0
public void resetCount() {
itemCount = 0;
}

// Reset item count to 0
public void incrementCount() {
itemCount = 0;
}

// Increments the item count if compareVal argument
// is equal to item value.
public void incrementIfDuplicate(Type compareVal) {
++itemCount;
}

// Returns string for item value and count using
// the format itemVal: itemCount
@Override
public String toString() {
return "" + itemVal + ": " + itemCount;
}
}

Explanation / Answer

DuplicateCounter.java

import java.util.Scanner;

public class DuplicateCounter {

public static void main(String[] args) {

Scanner scnr = new Scanner(System.in);

ItemCount<String> wordCounter = new ItemCount<String>();

String inputWord = "";

Integer count = 0;

wordCounter.setItem("that");

System.out.println("Enter words (END at end):");

// Read first word

inputWord = scnr.next();

// Keep reading until word read equals <end>

while( !inputWord.equals("END") ) {

count++;

wordCounter.incrementIfDuplicate(inputWord);

// Read next word

inputWord = scnr.next();

}

System.out.println("Number of words read: "+count);

// Display final word count

System.out.println("The word "" + wordCounter.getItem() +

"" was read " + wordCounter.getCount() +

" times.");

return;

}

}

ItemCount.java

public class ItemCount <Type extends Comparable<Type>> {

private Type itemVal; // Value for item

private int itemCount; // Count for item

// Set item value, and reset item count to 0

public void setItem(Type newItemVal) {

itemVal = newItemVal;

itemCount = 0;

}

// Get item value

public Type getItem() {

return itemVal;

}

// Get item count

public int getCount() {

return itemCount;

}

// Reset item count to 0

public void resetCount() {

itemCount = 0;

}

// Reset item count to 0

public void incrementCount() {

itemCount = 0;

}

// Increments the item count if compareVal argument

// is equal to item value.

public void incrementIfDuplicate(Type compareVal) {

if(itemVal.equals(compareVal))

++itemCount;

}

// Returns string for item value and count using

// the format itemVal: itemCount

@Override

public String toString() {

return "" + itemVal + ": " + itemCount;

}

}

Output:

Enter words (END at end):
aaaaa
bbbbb
ccccc
ddddd
that
wwww
that
that
END
Number of words read: 8
The word "that" was read 3 times.

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