With this example we are going to demonstrate how to get a copy of a Vector. We are using the synchronized statement in order to take a safe copy of the Vector’s elements. In short, to get a copy of a Vector you should:
- Create a new Vector.
- Populate the vector with elements, using
addElement(Object obj)API method of Vector. - Set the Vector in a
synchronizedstatement. - Create a new String array with the size equal to the Vector.size().
- Get each one of the Vector’s elements, using
elementAt(int index)API method of Vector and put it in the same index of the array.
Let’s take a look at the code snippet that follows:
package com.javacodegeeks.snippets.core;
import java.util.Vector;
public class VectorCopyExample {
public static void main(String[] args) {
Vector vector = new Vector();
vector.addElement("JavaCodeGeeks");
vector.addElement("is");
vector.addElement("Cool!");
String[] wordArray;
synchronized (vector) {
int size = vector.size();
wordArray = new String[size];
for (int i = 0; i < wordArray.length; i++) {
wordArray[i] = (String) vector.elementAt(i);
}
}
System.out.println("word.length" + wordArray.length);
for (int i = 0; i < wordArray.length; i++) {
System.out.println("[" + i + "]=" + wordArray[i]);
}
}
}
Output:
word.length3
[0]=JavaCodeGeeks
[1]=is
[2]=Cool!
This was an example of how to get a copy of a Vector in Java.
