Java中如何使用Lambda表达式实现ObjLongConsumer 接口
ObjLongConsumer<T>是来自java.util.function包的函数接口。此接口接受对象值和长值参数作为输入，但不产生任何输出。ObjLongConsumer<T>可以用作lambda表达式和方法引用的赋值目标，并且只包含一个抽象方法:accept()。
语法
@FunctionalInterface
public interface ObjLongConsumer<T> {
void accept(T t, long value)
}示例
import java.util.function.ObjLongConsumer;
public class ObjLongConsumerTest {
public static void main(String[] args) {
ObjLongConsumer<Employee> olc = (employee, number) -> { // lambda 表达式
if(employee != null) {
System.out.println("Employee Name: " + employee.getEmpName());
System.out.println("Old Mobile No: " + employee.getMobileNumber());
employee.setMobileNumber(number);
System.out.println("New Mobile No: " + employee.getMobileNumber());
}
};
Employee empObject = new Employee("Adithya", 123456789L);
olc.accept(empObject, 987654321L);
}
}
// Employee class
class Employee {
private String empName;
private Long mobileNum;
public Employee(String empName, Long mobileNum){
this.empName = empName;
this.mobileNum = mobileNum;
}
public String getEmpName() {
return empName;
}
public void setEmpName(String empName) {
this.empName = empName;
}
public Long getMobileNumber() {
return mobileNum;
}
public void setMobileNumber(Long mobileNum) {
this.mobileNum = mobileNum;
}
}输出结果
Employee Name: Adithya Old Mobile No: 123456789 New Mobile No: 987654321