Main.java

import javax.print.attribute.HashPrintRequestAttributeSet;
import javax.print.attribute.PrintRequestAttributeSet;
import javax.print.attribute.Size2DSyntax;
import javax.print.attribute.standard.MediaSize;
 
public class Main {
 
    public static void main(String[] args) {
        PrintRequestAttributeSet aset = new HashPrintRequestAttributeSet();
        aset.add(new MediaSize(60,80,Size2DSyntax.MM));
    }
 
}

output

Exception in thread "main" java.lang.ClassCastException
	at javax.print.attribute.AttributeSetUtilities.verifyAttributeValue(AttributeSetUtilities.java:534)
	at javax.print.attribute.HashAttributeSet.add(HashAttributeSet.java:283)
	at Main.main(Main.java:10)