How to count the Number of Occurrences of Specific Item in the Vector in Java - Step by Step Examples

How to count the Number of Occurrences of Specific Item in the Vector in Java ?

Answer

To count the number of occurrences of a specific item in a Vector in Java, you can use a loop to iterate through the Vector and count the occurrences manually.

✐ Examples

1 Count Occurrences of a Specific Item in a Vector

In this example,

We start by importing the java.util.Vector class which allows us to use the Vector data structure.
Next, we create a new Vector instance named vector and add several elements to it using the add method.
We initialize a variable named count to 0. This variable will be used to keep track of the number of occurrences of the specific item we are counting.
We define the item we want to count the occurrences of and store it in a variable named itemToCount.
We use a for loop to iterate through each element in the Vector. The loop goes from the first element to the last element of the Vector.
Inside the loop, we use an if statement to check if the current element of the Vector is equal to itemToCount. If it is, we increment the count variable by 1.
After the loop completes, we print the value of the count variable to standard output, which represents the number of times itemToCount appears in the Vector.

Java Program

import java.util.Vector;

public class Main {
    public static void main(String[] args) {
        // Step 1: Create a Vector and add elements
        Vector<String> vector = new Vector<>();
        vector.add("apple");
        vector.add("banana");
        vector.add("apple");
        vector.add("orange");
        vector.add("apple");

        // Step 2: Initialize count variable
        int count = 0;

        // Step 3: Define the item to count
        String itemToCount = "apple";

        // Step 4: Iterate through the Vector
        for (String item : vector) {
            // Step 5: Check if the current item is equal to itemToCount
            if (item.equals(itemToCount)) {
                // Step 6: Increment the count
                count++;
            }
        }

        // Step 7: Print the count
        System.out.println("Number of occurrences of " + itemToCount + ": " + count);
    }
}

Output

Number of occurrences of apple: 3

2 Count Occurrences of a Specific Integer in a Vector

In this example,

We start by importing the java.util.Vector class which allows us to use the Vector data structure.
Next, we create a new Vector instance named vector and add several integer elements to it using the add method.
We initialize a variable named count to 0. This variable will be used to keep track of the number of occurrences of the specific integer we are counting.
We define the integer we want to count the occurrences of and store it in a variable named numberToCount.
We use a for loop to iterate through each element in the Vector. The loop goes from the first element to the last element of the Vector.
Inside the loop, we use an if statement to check if the current element of the Vector is equal to numberToCount. If it is, we increment the count variable by 1.
After the loop completes, we print the value of the count variable to standard output, which represents the number of times numberToCount appears in the Vector.

Java Program

import java.util.Vector;

public class Main {
    public static void main(String[] args) {
        // Step 1: Create a Vector and add elements
        Vector<Integer> vector = new Vector<>();
        vector.add(1);
        vector.add(2);
        vector.add(3);
        vector.add(1);
        vector.add(4);
        vector.add(1);

        // Step 2: Initialize count variable
        int count = 0;

        // Step 3: Define the number to count
        int numberToCount = 1;

        // Step 4: Iterate through the Vector
        for (int number : vector) {
            // Step 5: Check if the current number is equal to numberToCount
            if (number == numberToCount) {
                // Step 6: Increment the count
                count++;
            }
        }

        // Step 7: Print the count
        System.out.println("Number of occurrences of " + numberToCount + ": " + count);
    }
}

Output

Number of occurrences of 1: 3

Summary

In this tutorial, we learned How to count the Number of Occurrences of Specific Item in the Vector in Java language with well detailed examples.

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How to count the Number of Occurrences of Specific Item in the Vector in Java - Step by Step Examples

How to count the Number of Occurrences of Specific Item in the Vector in Java ?

Answer

✐ Examples

1 Count Occurrences of a Specific Item in a Vector

Java Program

Output

2 Count Occurrences of a Specific Integer in a Vector

Java Program

Output

Summary

More Java Vectors Tutorials