}classExample{//内部类,访问修饰符是privateprivateclassInsideClassimplementsInterfaceTest{publicvoidtest(){ System.out.println("这是一个测试"); } }publicInterfaceTestgetIn(){returnnewInsideClass(); } }publicclassTestExample{publicstaticvoidmain(String args[]){ Example a=newExample();//从这段代码...
在上面的示例程序中,尽管外部类 OutsideClass 的属性是用 private 修饰的,内部类 InsideClass 依然可以对这些属性进行无缝访问。此时教学重点在于从两个角度给学生讲解内部类对外部类的访问:一个角度是把内部类看成外部类的一个成员,外部内的一个成员当然可...
private String data 这样定义一个“平行的”成员内部类: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 private class Inner 具体看下面的例子: Outter.java: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 public class Outter { // 成员变量data private String data = "外部数据"; //定义一个...
publicclassOuter {privatestaticinti = 1;privateintj = 10;publicstaticvoidouter_f1() {}publicvoidouter_f2() {}//静态内部类可以用public,protected,private修饰//静态内部类中可以定义静态或者非静态的成员privatestaticclassInner {staticintinner_i = 100;intinner_j = 200;staticvoidinner_f1() {//静态...
public class Timer_Util extends Timer { private static boolean flag = true; public static void main(String[] args) { Date date = new Date(); System.out.println(date); int seconds = date.getSeconds(); // System.out.println("seconds=" + seconds); ...
(1)Bootstrap CLassloder(引导类加载器) (2)User Define Classloader(用户自定义的类加载器) 引导类加载器是本身就是JVM规范的一部分,它与OS平台有关,依赖于OS的实现方式加载类型(包括JavaAPI的类和接口),所以在Java里面引导类加载器只能是native实现的,尽管它是所有类加载器的父加载器,但它却不是Java实现的,...
在Java 语言中使用 abstract class 来定义抽象类。如下实例: Employee.java 文件代码: /*文件名 : Employee.java*/publicabstractclassEmployee{privateStringname;privateStringaddress;privateintnumber;publicEmployee(Stringname,Stringaddress,intnumber){System.out.println("Constructing an Employee");this.name=name;...
It is important to note that, although thegetCarName()is aprivatemethod, we are able to access it from the inner class. Static Nested Class In Java, we can also define astaticclass inside another class. Such class is known asstatic nested class. Static nested classes are not called static...
private String name = "$"; public void method() { System.out.println(name); } } } } } } public class InsideClassDemo { public static void main(String[] args) { Outside.Inside.Ininside.Inininside demo = new Outside().new Inside().new Ininside().new Inininside(); ...
publicabstractclassEmployee{privateStringname;privateStringaddress;privateintnumber;publicabstractdoublecomputePay();//其余代码} 声明抽象方法会造成以下两个结果: 如果一个类包含抽象方法,那么该类必须是抽象类。 任何子类必须重写父类的抽象方法,要不就选择声明自身为抽象类,二选一。