// Java code to print the elements of Stream// using double colon operatorimportjava.util.stream.*;classGFG{publicstaticvoidmain(String[] args){// Get the streamStream<String> stream = Stream.of("Geeks","For","
AI代码解释 classHey{publicdoublesquare(double num){returnMath.pow(num,2);}}Hey hey=newHey();Function<Double,Double>square=hey::square;double ans=square.apply(23d); Functionabove is afunctional interface.Function上面是一个功能性的接口 。To fully understand::, it is important to understand fun...
As we’re starting to see, the double colon operator – introduced in Java 8 – will be very useful in some scenarios, and especially in conjunction with Streams. It’s also quite important to have a look at functional interfaces for a better understanding of what happens behind the scenes....
AI代码解释 String[]atp={"Rafael Nadal","Novak Djokovic","Stanislas Wawrinka","David Ferrer","Roger Federer","Andy Murray","Tomas Berdych","Juan Martin Del Potro"};List<String>players=Arrays.asList(atp);// 以前的循环方式for(String player:players){System.out.print(player+"; ");}// 使...
(atp); // 以前的循环方式 for (String player : players) { System.out.print(player + "; "); } // 使用 lambda 表达式以及函数操作(functional operation) players.forEach((player) -> System.out.print(player + "; ")); // 在 Java 8 中使用双冒号操作符(double colon operator) players.for...
}//使用 lambda 表达式以及函数操作(functional operation)players.forEach((player) -> System.out.print(player +";"));//在 Java 8 中使用双冒号操作符(double colon operator)players.forEach(System.out::println); 正如您看到的,lambda表达式可以将我们的代码缩减到一行。 另一个例子是在图形用户界面程序...
StackOverflow：Why did Java 8 introduce a new "::" operator for method references?
// 在 Java 8 中使用双冒号操作符(double colon operator) players.forEach(System.out::println); 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 正如您看到的,lambda表达式可以将我们的代码缩减到一行。 另一个例子是在图形用户界面程序中,匿名类可以使用lambda表达式来代替...
In this example, we define a list of integers and use the forEach() method to print each element to the console. Instead of using a lambda expression to define the action, we use a method reference to the static method System.out.println(). The double colon (::) operator is used to...
// method reference is denoted by :: (double colon) operator // looks similar to score resolution operator of C++ features.forEach(System.out::println); Output: Lambdas Default Method Stream API Date and Time API 1. 2. 3. 4. 5. ...