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import java.util.function.BiFunction;
public class MethodReferencesExamples {
public static T mergeThings(T a, T b, BiFunction merger) {
return merger.apply(a, b);
}
public static String appendStrings(String a, String b) {
return a + b;
}
public String appendStrings2(String a, String b) {
return a + b;
}
public static void main(String[] args) {
MethodReferencesExamples myApp = new MethodReferencesExamples();
// Calling the method mergeThings with a lambda expression
System.out.println(MethodReferencesExamples.
mergeThings("Hello ", "World!", (a, b) -> a + b));
// Reference to a static method
System.out.println(MethodReferencesExamples.
mergeThings("Hello ", "World!", MethodReferencesExamples::appendStrings));
// Reference to an instance method of a particular object
System.out.println(MethodReferencesExamples.
mergeThings("Hello ", "World!", myApp::appendStrings2));
// Reference to an instance method of an arbitrary object of a
// particular type
System.out.println(MethodReferencesExamples.
mergeThings("Hello ", "World!", String::concat));
}
}