方法引用简化字符串长度获取

package _5_26;

 

 

public class methodReference {

public static void main(String[] args) {

// Using object method reference

Function<String, Integer> fn1 = (String str) -> {

return str.length();

};

Integer aLength = fn1.apply("hello world");

System.out.println("String length is: " + aLength);

 

// Using method reference shorthand

Function<String, Integer> fn2 = String::length;

Integer bLength = fn2.apply("hello world");

System.out.println("String length is: " + bLength);

}

}