Java call-by-value, pass arrays/autoboxing

ObjPass.java

import java.util.LinkedList;
import java.util.ListIterator;

public class ObjPass {
	public static void change_int(Integer i) {
		i = 1000;
	}

	public static void change_string(String a) {
		a = "changed";
	}

	public static void change_array(int[] a) {
		a[0] = 10;
	}

	public static void change_linkedList(LinkedList<String> linkedList) {
		linkedList.set(0, "changed");
	}

	public static void solution() {
		// integer
		Integer integer = new Integer(10);
		change_int(integer);
		System.out.println("integer = " + integer);

		// string
		String string = "a string";
		change_string(string);
		System.out.println(string);

		// array
		int[] a = {0,1,2,3,4};
		change_array(a);
		for (int e : a)
			System.out.print(e + " ");
		System.out.println();

		// linked list
		LinkedList<String> linkedList = new LinkedList<String>();
		linkedList.add("eBay");
		linkedList.add("Paypal");
		linkedList.add("Google");
		linkedList.add("Yahoo");
		linkedList.add("IBM");
		linkedList.add("Facebook");

		change_linkedList(linkedList);

		for (int i = 0; i < linkedList.size(); i++)
			System.out.print(linkedList.get(i) + " ");
		System.out.println();

		//ListIterator<String> listIterator = linkedList.listIterator();
		//while (listIterator.hasNext()) {
		//	System.out.print(listIterator.next() + " ");
		//}
		for(ListIterator listIterator = linkedList.listIterator(); listIterator.hasNext();) {
			System.out.print(listIterator.next() + " ");
		}
		System.out.println();
		for (String str: linkedList) {
			System.out.print(str + " ");
		}
		System.out.println();
	}

	public static void main(String[] args) {
		solution();
	}
}

Output:

integer = 10
a string
10 1 2 3 4 
changed Paypal Google Yahoo IBM Facebook 
changed Paypal Google Yahoo IBM Facebook 
changed Paypal Google Yahoo IBM Facebook

Only array and linked list are updated. The others are autoboxing primitives http://beginnersbook.com/2014/09/java-autoboxing-and-unboxing-with-examples/.

For other data structures that may get updated