With this example we are going to demonstrate how to set the Vector size, that is setting a greater or less size than the current size of the Vector. In short, to set the Vector size you should:
- Create a new Vector.
- Populate the vector with elements, with
add(E e)API method of Vector. - Invoke the
setSize(int newSize)API method of Vector. If thenewSizeis less than the current size of the Vector elements afternewSizeindex are discarded. If thenewSizeis greater than the current size of Vector, null values are added at the end of the Vector.
Let’s take a look at the code snippet that follows:
package com.javacodegeeks.snippets.core;
import java.util.Vector;
public class SetVectorSizeExample {
public static void main(String[] args) {
// Create a Vector and populate it with elements
Vector vector = new Vector();
vector.add("element_1");
vector.add("element_2");
vector.add("element_3");
vector.add("element_1");
vector.add("element_2");
vector.add("element_3");
vector.add("element_2");
/*
void setSize(int newSize) sets the size of the Vector. If the newSize is less
than the current size of the Vector elements after newSize index are discarded.
If the newSize is grater than the current size of Vector, null values are added
at the end of the Vector.
*/
vector.setSize(3);
System.out.println("Vector(" + vector.size() + ") contains elements : " + vector);
vector.setSize(5);
System.out.println("Vector(" + vector.size() + ") contains elements : " + vector);
}
}
Output:
Vector(3) contains elements : [element_1, element_2, element_3]
Vector(5) contains elements : [element_1, element_2, element_3, null, null]
This was an example of how to set the Vector size in Java.
