标签：val 运行 err gen int 如何 ram generate bsp
函数式编程
@FunctionalInterface interface Lf{ void dispaly(); }
@FunctionalInterface为显示定义函数时编程接口，不符合函数式编程接口会报错
匿名内部类使用方式
public class FunPrograming {
public static void main(String[] args) {
func func = new func() {
@Override
public void dispaly() {
// TODO Auto-generated method stub
System.out.println("dispaly()运行");
}
};
func.dispaly();
}
}
dispaly()运行
lamada: 拷贝小括号，写死->,落地大括号{}
public class FunPrograming { public static void main(String[] args) { func func = ()->{ System.out.println("dispaly()运行"); }; func.dispaly(); } }
dispaly()运行
带返回值的接口
@FunctionalInterface interface func {//Invalid ‘@FunctionalInterface‘ annotation; func is not a functional interface定义两个普通方法就会报错，不符合函数编程 public void dispaly(); public int add(int x,int y); }
//拷贝小括号，写死->,落地大括号{}
@FunctionalInterface interface func { //public void dispaly(); public int add(int x,int y); } public class FunPrograming { public static void main(String[] args) { func func = (int x,int y)->{ System.out.println("add(int x,int y)运行"); return x+y; }; System.out.println(func.add(3,5)); } } add(int x,int y)运行 8
函数式编程接口中如何定义多个方法
@FunctionalInterface interface func { default void dispaly() { System.out.println("default void dispaly()"); } default int mul(int x ,int y) { System.out.println("default int mul"); return x* y; } static int dec(int x,int y) { System.out.println("static int dec(int x,int y)"); return x-y; } static int div(int x,int y) { System.out.println("static int div(int x,int y)"); return x/y; } public int add(int x,int y); }
标签：val 运行 err gen int 如何 ram generate bsp
原文地址：https://www.cnblogs.com/flgb/p/11768282.html
