Java Iterable Item contains(Iterable<?> iter, Object o)

Description

Test whether the given object appears in an iteration of iter .

License

BSD License

Declaration

public static boolean contains(Iterable<?> iter, Object o)

Method Source Code


//package com.java2s;
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PLT Utilities BSD License
    
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import java.util.*;

public class Main {
    /**
     * Test whether the given object appears in an iteration of {@code iter}.  Uses the
     * {@link Collection#contains} method where possible; otherwise, may take linear time.
     */
    public static boolean contains(Iterable<?> iter, Object o) {
        if (iter instanceof Collection<?>) {
            return ((Collection<?>) iter).contains(o);
        } else {
            return iteratedContains(iter, o);
        }
    }

    private static boolean iteratedContains(Iterable<?> iter, Object o) {
        if (o == null) {
            for (Object elt : iter) {
                if (elt == null) {
                    return true;
                }
            }
            return false;
        } else {
            for (Object elt : iter) {
                if (o.equals(elt)) {
                    return true;
                }
            }
            return false;
        }
    }
}

Java Iterable Item contains(Iterable iter, Object o)

Description

License

Declaration

Method Source Code

Related