/* package whatever; // don't place package name! */
 
class Ideone
{
	static class Example {
		public int val;
		public Example(int val) {
			this.val = val;
		}
	}
 
	static void swap(Example a, Example b) {
		Example temp = a;
		a = b;
		b = temp;
	}
 
	public static void main (String[] args) throws java.lang.Exception
	{
		Example a = new Example(1);
		Example b = new Example(2);
 
		swap(a, b);
 
		System.out.println(a.val + " " + b.val);
	}
}

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