APP
package com; import java.util.function.Function; public class FuctionDemo { public static void main(String[] args) { convert("100",s -> Integer.parseInt(s),integer ->String.valueOf(integer+100)); } private static void convert(String s, Function<String,Integer> fun1,Function<Integer,String> fun2){ // Integer s1 = fun1.apply(s); // String s2 = fun2.apply(s1); // System.out.println(s2); String apply = fun1.andThen(fun2).apply(s); System.out.println(apply); } }
package com;
import java.util.function.Function;
/**
* 練習(xí)，String s = "張三,30";
* 1，將字符串截取得到數(shù)字年齡部分
* 2，將上一步的年齡字符串轉(zhuǎn)換成int類型數(shù)據(jù)
* 3，將上一步的int數(shù)據(jù)加70，得到一個int結(jié)果，在控制臺輸出
*/
public class FuctionDemo2 {
public static void main(String[] args) {
convert("張三,30",s -> s.split(",")[1],Integer::parseInt,integer -> integer+70);
convert("張三,30",s -> Integer.parseInt(s.split(",")[1]),integer -> integer+70);
convert("張三,30",s -> Integer.parseInt(s.split(",")[1])+70);
}
public static void convert(String s, Function<String,String>fun1,Function<String ,Integer>fun2,Function<Integer,Integer>fun3){
Integer apply = fun1.andThen(fun2).andThen(fun3).apply(s);
System.out.println(apply);
}
public static void convert(String s, Function<String,Integer>fun1,Function<Integer ,Integer>fun2){
Integer apply = fun1.andThen(fun2).apply(s);
System.out.println(apply);
}
public static void convert(String s, Function<String,Integer>fun1){
Integer apply = fun1.apply(s);
System.out.println(apply);
}
}
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本文摘自 ：https://www.cnblogs.com/
