lambda

Java 8 method references, double colon (::) operator

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In Java 8, the double colon (::) operator is called method references. Refer to the following examples: Anonymous class to print a list. List<String> list = Arrays.asList("node", "java", "python", "ruby"); list.forEach(new Consumer<String>() { // anonymous class @Override public void accept(String str) { System.out.println(str); } }); Anonymous class -> Lambda expressions. List<String> list = Arrays.asList("node", "java", …

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Java 8 Lambda : Comparator example

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In this example, we will show you how to use Java 8 Lambda expression to write a Comparator to sort a List. 1. Classic Comparator example. Comparator<Developer> byName = new Comparator<Developer>() { @Override public int compare(Developer o1, Developer o2) { return o1.getName().compareTo(o2.getName()); } }; 2. Lambda expression equivalent. Comparator<Developer> byName = (Developer o1, Developer o2)->o1.getName().compareTo(o2.getName()); …

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