Unsupported.java Source code

Introduction

Here is the source code for Unsupported.java

Source

// : c11:Unsupported.java
// Sometimes methods defined in the Collection interfaces don't work!
// {ThrowsException}
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.

import java.util.Arrays;
import java.util.List;
import java.util.ListIterator;

public class Unsupported {
    static List a = Arrays.asList("one two three four five six seven eight".split(" "));

    static List a2 = a.subList(3, 6);

    public static void main(String[] args) {
        System.out.println(a);
        System.out.println(a2);
        System.out.println("a.contains(" + a.get(0) + ") = " + a.contains(a.get(0)));
        System.out.println("a.containsAll(a2) = " + a.containsAll(a2));
        System.out.println("a.isEmpty() = " + a.isEmpty());
        System.out.println("a.indexOf(" + a.get(5) + ") = " + a.indexOf(a.get(5)));
        // Traverse backwards:
        ListIterator lit = a.listIterator(a.size());
        while (lit.hasPrevious())
            System.out.print(lit.previous() + " ");
        System.out.println();
        // Set the elements to different values:
        for (int i = 0; i < a.size(); i++)
            a.set(i, "47");
        System.out.println(a);
        // Compiles, but won't run:
        lit.add("X"); // Unsupported operation
        a.clear(); // Unsupported
        a.add("eleven"); // Unsupported
        a.addAll(a2); // Unsupported
        a.retainAll(a2); // Unsupported
        a.remove(a.get(0)); // Unsupported
        a.removeAll(a2); // Unsupported
    }
} ///:~