1interfaceA{2//成员变量3publicstaticfinalinti=10;//接口中默认有:public static final修饰变量;最终都是常量4//成员函数5publicvoidprint();6}7//Demo11就实现了A接口8classDemo11implementsA{9//实现接口中的方法10publicvoidprint(){11System.out.println("hello"+"--->"+i);12}13publicstaticvoidmain...
java中没有多继承,为了弥补这里的不足,用到了 interface 。 java 中的接口定义基本上就是像C++中的类中定义的类中包含实虚函数也就是C++中的抽象类。 接口不能创建实例,但是可用于声明引用变量类型。 一个类实现了接口,必须实现接口中所有的方法。 接口支持多继承,例如:class A extends B implements C,D,E ...
public interface Animal { void breath(); } public interface Mammal extends Animal { void run(); } public class Tiger implements Mammal { // 类要实现接口的所有方法 public void breath() { System.out.println("老虎用肺呼吸"); } public void run() { System.out.println("老虎用四条腿跑"); ...
接口的关键字是interface,形式为public interface 接口名{} 注意点:①接口不能实例化(无法创建接口的对象) ②接口与类之间是实现关系,通过关键字implements表示, 形式为public class 类名 implements 接口名{} ③接口的子类(实现类) 1. 要么重写接口中的所有抽象方法 2.要么是抽象类 ④接口和类的实现关系,可以单...
Java.Lang.Class Java.Lang.Reflect.Constructor Java.Lang.Reflect.Executable Java.Lang.Reflect.Method Attributes RegisterAttribute Implements IJavaObjectIJavaPeerableIAnnotatedElementIDisposable Remarks A common interface for all entities that declare type variables. ...
implements 接口名 { } interface A{ //成员变量 publicstaticfinalint i=10; //成员函数 publicvoid print(); } class Demo7 implements A{// Demo7就实现了A接口 publicstaticvoid main(String[] args) { Demo7 d=new Demo7(); d.print(); ...
If this Class object represents a local or anonymous class within a method, returns a java.lang.reflect.Method Method object representing the immediately enclosing method of the underlying class. GenericSuperclass Returns the Type representing the direct superclass of the entity (class, interface, ...
Returns an array of Class objects that represent the types of exceptions declared to be thrown by the underlying executable represented by this object. GetGenericExceptionTypes() Returns an array of Type objects that represent the exceptions declared to be thrown by this executable object. GetGener...
Executable.InterfaceConsts Bidang Field.InterfaceConsts GenericSignatureFormatError IAnnotatedElement IGenericArrayType IGenericDeclaration IInvocationHandler IMember InvocationTargetException IParameterizedType IParameterizedType Properti Metode IType ITypeVariable ...
}classPersonimplementsRunner {publicvoidstart() {//准备工作:弯腰、蹬腿、咬牙、瞪眼//开跑}publicvoidrun() {//摆动手臂//维持直线方向}publicvoidstop() {//减速直至停止、喝水。} } 4.示例四 一个类可以实现多个无关的接口: interfaceRunner {publicvoidrun();}interfaceSwimmer {publicdoubleswim();}cla...