publicinterfaceMyInterface{publicvoidmethod1();publicdefaultvoidcallAnotherInterface(){AnotherInterfaceanotherInterface=newAnotherInterfaceImpl();anotherInterface.method2();}}publicinterfaceAnotherInterface{publicvoidmethod2();}publicclassAnotherInterfaceImplimplementsAnotherInterface{@Overridepublicvoidmethod2(){System...
然后,我们创建第二个接口的实现类AnotherInterfaceImpl,它实现了AnotherInterface接口中的方法。 publicclassAnotherInterfaceImplimplementsAnotherInterface{// 方法的实现} 1. 2. 3. 3.5 定义实现多个接口的类 最后,我们可以创建一个类MyClass,它实现了MyInterface和AnotherInterface两个接口。 publicclassMyClassimplements...
public interface DoItPlus extends DoIt { boolean didItWork(int i, double x, String s); } 现在,您的代码的用户可以选择继续使用旧接口或升级到新接口。 另外,您还可以将新方法定义为默认方法。以下示例定义了一个名为didItWork的默认方法: public interface DoIt { void doSomething(int i, double x);...
extends可以理解为全盘继承了父类的功能 implements可以理解为为这个类附加一些额外的功能 举个例子,Animal是一个父类,cat,dog,bird,insect都extends了Animal, 但是cat,dog,bird还可以implements比如run,shout这些interface,bird,insect可以implements比如fly这些interface interface是一个接口,类似于C++中的纯虚函数。 举个...
}publicclassMyClassimplementsMyInterface{@OverridepublicvoidmyMethod(){ System.out.println("MyInterface method implementation"); }publicvoidmyMethod(String param){ System.out.println("Another method implementation with a parameter"); } } 使用接口继承:如果多个接口中有相同的方法签名,可以通过让一个接口...
To access the interface methods, the interface must be "implemented" (kinda like inherited) by another class with theimplementskeyword (instead ofextends). The body of the interface method is provided by the "implement" class: //InterfaceinterfaceAnimal {publicvoidanimalSound();//interface method...
// interfaceinterfaceAnimal{publicvoidanimalSound();// interface method (does not have a body)publicvoidrun();// interface method (does not have a body)} To access the interface methods, the interface must be "implemented" (kinda like inherited) by another class with theimplementskeyword (ins...
An interface extends another interface by adding methods. Class X is said to be a subclass of class Y. See also derived from. Enterprise JavaBeans (EJB) EJB is a server-side specification that handles business logic such as persistence, transactional integrity, and security in a standardized ...
implements 关键字在 class 声明中使用,以指示所声明的类提供了在 implements 关键字后面的名称所指定的接口中所声明的所有方法的实现。类必须提供在接口中所声明的所有方法的实现。一个类可以实现多个接口。 6) interface 接口 interface 关键字用来声明新的 Java 接口,接口是方法的集合。
publicbooleanequals(Object anObject){if(this==anObject){returntrue;}if(anObjectinstanceofString){String anotherString=(String)anObject;int n=value.length;if(n==anotherString.value.length){char v1[]=value;char v2[]=anotherString.value;int i=0;while(n--!=0){if(v1[i]!=v2[i])returnfa...