How to Get Length of a Vector in Java - Step by Step Examples

How to Get Length of a Vector in Java ?

Answer

To get the length of a vector in Java, you can use the size method of the java.util.Vector class.


✐ Examples

1 Get Length of a Numeric Vector

In this example,

  1. We import the java.util.Vector class to use the Vector data structure.
  2. We create a Vector named numVector that holds integers using the Vector declaration.
  3. We add elements to numVector using the add method to simulate a numeric vector with values.
  4. We call the size method on numVector to get the number of elements in the vector. The size method returns the length of the vector as an int value.
  5. We assign the result of the size method to a variable named numVectorLength.
  6. Finally, we print the length of the vector using System.out.println to display the value of numVectorLength on the console.

Java Program

import java.util.Vector;

public class Main {
    public static void main(String[] args) {
        Vector<Integer> numVector = new Vector<>();
        numVector.add(10);
        numVector.add(20);
        numVector.add(30);
        int numVectorLength = numVector.size();
        System.out.println("Length of numeric vector: " + numVectorLength);
    }
}

Output

Length of numeric vector: 3

2 Get Length of a String Vector

In this example,

  1. We import the java.util.Vector class to use the Vector data structure.
  2. We create a Vector named strVector that holds strings using the Vector declaration.
  3. We add elements to strVector using the add method to simulate a string vector with values.
  4. We call the size method on strVector to get the number of elements in the vector. The size method returns the length of the vector as an int value.
  5. We assign the result of the size method to a variable named strVectorLength.
  6. Finally, we print the length of the vector using System.out.println to display the value of strVectorLength on the console.

Java Program

import java.util.Vector;

public class Main {
    public static void main(String[] args) {
        Vector<String> strVector = new Vector<>();
        strVector.add("apple");
        strVector.add("banana");
        strVector.add("cherry");
        int strVectorLength = strVector.size();
        System.out.println("Length of string vector: " + strVectorLength);
    }
}

Output

Length of string vector: 3

Summary

In this tutorial, we learned How to Get Length of a Vector in Java language with well detailed examples.


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  28. How to create a Two Dimensional Vector in Java ?
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  35. How to Insert an Item at Specific Index in a Vector in Java ?
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  37. How to Concatenate Two Vectors in Java ?
  38. How to check if Two Vectors are Equal in Java ?
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  40. How to Convert a Vector of Integers to a Vector of Strings in Java ?
  41. How to Convert a Vector of Strings to a Vector of Integers in Java ?
  42. How to Convert a Vector of Floats to a Vector of Strings in Java ?
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  48. How to get Last N Items from a Vector in Java ?
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