test/langtools/tools/javac/ClassModifiers/InterfaceAndInnerClsCtor.java

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/**
 * @test
 * @bug 4221648
 * @summary If an interface has an inner class, the constructor for that inner
 * class must be accessible to the interface, regardless of whether it is
 * explicitly declared private.
 *
 * @clean InterfaceAndInnerClsCtor
 * @compile InterfaceAndInnerClsCtor.java
 */

public interface InterfaceAndInnerClsCtor
{
    // All interface memebers are implicitly public. Hence, there is no need to
    // have other inner classes with different access levels.
    public static class Inner {
        // A constructor for each of the possible access levels.
        public Inner(boolean b) {}
        Inner(char c) {}
        protected Inner(int i) {}
        private Inner() {}
    }

    // Verify that all of the constructors are accessible at compile time.
    public final static Inner i0 = new Inner(true);
    public final static Inner i1 = new Inner('a');
    public final static Inner i2 = new Inner(7);
    public final static Inner i3 = new Inner();
}