Java接口是什么意思_JAVA接口

@FunctionalInterface
public interface Supplier<T> {

    /**
     * Gets a result.
     *
     * @return a result
     */
    T get();
}

Supplier<String> supplier = String::new;
        System.out.println(supplier.get());//""
        Supplier<Emp> supplierEmp = Emp::new;
        Emp emp = supplierEmp.get();
        emp.setName("dd");
        System.out.println(emp.getName());//dd

public static class Emp {
        private String name;

        public Emp() {

        }

        public Emp(String name) {
            super();
            this.name = name;
        }

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }

    }