32 lines
693 B
Java
32 lines
693 B
Java
// functional/UnboundMethodReference.java
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// (c)2016 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://mindviewinc.com/Books/OnJava/ for more book information.
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// Method reference without an object.
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class X {
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String f() { return "X::f()"; }
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}
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interface MakeString {
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String make();
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}
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interface TransformX {
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String transform(X x);
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}
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public class UnboundMethodReference {
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public static void main(String[] args) {
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// MakeString ms = X::f; // (1)
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TransformX sp = X::f;
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X x = new X();
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System.out.println(sp.transform(x)); // (2)
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System.out.println(x.f()); // Same effect
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}
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}
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/* Output:
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X::f()
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X::f()
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*/
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