Java Vector get()

Java Vector [Java Vector] Java Vector

Vector.get() Java Vector Vector java.util.Vector Java 

public E get(int index)

  • E Vector
  • index 0

get()

index int 0

get()

  • ArrayIndexOutOfBoundsException

import java.util.Vector;

public class VectorGetExample {
    public static void main(String[] args) {
        // Vector
        Vector<String> fruits = new Vector<>();
        fruits.add("Apple");
        fruits.add("Banana");
        fruits.add("Orange");
       
        // get()
        String firstFruit = fruits.get(0);
        System.out.println(": " + firstFruit);  // : : Apple
       
        String secondFruit = fruits.get(1);
        System.out.println(": " + secondFruit); // : : Banana
    }
}

Vector

import java.util.Vector;

public class VectorIteration {
    public static void main(String[] args) {
        Vector<Integer> numbers = new Vector<>();
        numbers.add(10);
        numbers.add(20);
        numbers.add(30);
       
        // get() Vector
        for (int i = 0; i < numbers.size(); i++) {
            System.out.println(" " + i + " : " + numbers.get(i));
        }
    }
}

get() ArrayIndexOutOfBoundsException

import java.util.Vector;

public class VectorExceptionHandling {
    public static void main(String[] args) {
        Vector<String> colors = new Vector<>();
        colors.add("Red");
        colors.add("Green");
       
        try {
            //
            String color = colors.get(2);
            System.out.println(color);
        } catch (ArrayIndexOutOfBoundsException e) {
            System.out.println(": ");
            System.out.println("Vector : " + colors.size());
        }
    }
}

Vector.get() O(1)Vector ArrayList

7. ArrayList get()

Vector.get() ArrayList.get()
O(1) O(1)

  1. if (index >= 0 && index < vector.size()) {
        E element = vector.get(index);
        //
    }

  2. for for-each Vector

    for (String fruit : fruits) {
        System.out.println(fruit);
    }

  3. Vector ArrayList

9.

Vector.get() Vector Java

Java Vector [Java Vector] Java Vector