How to get the Index of Specified Item in a Vector in Java - Step by Step Examples

How to get the Index of Specified Item in a Vector in Java ?

Answer

To get the index of a specified item in a Vector in Java using java.util.Vector, you can use the indexOf method.


✐ Examples

1 Find Index of Specified Item in Numeric Vector

In this example,

  1. We have a Vector named vec containing numeric elements.
  2. We use the indexOf method to find the index of the specified item.
  3. Finally, we print the index to standard output.

Java Program

import java.util.Vector;

public class Main {
    public static void main(String[] args) {
        Vector<Integer> vec = new Vector<Integer>();
        vec.add(1);
        vec.add(2);
        vec.add(3);
        vec.add(4);
        vec.add(5);
        int item = 3;
        int index = vec.indexOf(item);
        System.out.println(index);
    }
}

Output

2

2 Find Index of Specified Item in String Vector

In this example,

  1. We have a Vector named vec containing string elements.
  2. We use the indexOf method to find the index of the specified item.
  3. Finally, we print the index to standard output.

Java Program

import java.util.Vector;

public class Main {
    public static void main(String[] args) {
        Vector<String> vec = new Vector<String>();
        vec.add("apple");
        vec.add("banana");
        vec.add("cherry");
        vec.add("date");
        String item = "banana";
        int index = vec.indexOf(item);
        System.out.println(index);
    }
}

Output

1

Summary

In this tutorial, we learned How to get the Index of Specified Item in a Vector in Java language with well detailed examples.


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