public static void main(String[] args) { System.out.println("inside main"); new Candy(); System.out.println("After creating Candy"); try { Class.forName("com.zj.sample.Gum"); } catch (ClassNotFoundException e) { System.out.println("Couldn't find Gum"); } System.out.println("Afte...
inside main --- Loading Cat true true finish main */ 从上面我们可以看出执行不同获取Class引用的方法,返回的其实都是同一个Class对象。 其实对于任意一个Class对象,都需要由它的类加载器和这个类本身一同确定其在就Java虚拟机中的唯一性,也就是说,即使两个Class对象来源于同一个Class文件,只要加载它...
Remember how we have been defining a class inside another class so far for all our coding scenarios? This is typically called as nesting. Also, you might have noticed how we had never made our top level class as static. The reason is plain and simple. Because in Java it can’t be done!
In the above program, there are two nested classes:ProcessorandRAMinside the outer class:CPU. We can declare the inner class as protected. Hence, we have declared the RAM class as protected. Inside the Main class, we first created an instance of an outer classCPUnamedcpu. Using the instanc...
Main.java:28: error: cannot find symbol mammal.eat(); ^ symbol: method eat() location: variable mammal of type Mammal 1 error compiler exit status 1 In the above example, we have created a non-static methodeat()inside the classAnimal. ...
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16 System.out.println("inside main"); 17 try{ 18 classType=Class.forName("typeInfo.Gum"); 19 }catch(ClassNotFoundException e){ 20 System.out.println("Couldn't not find Gum"); 21 } 22 System.out.println("After creating Class.forName(\"Gum\")"); ...
inside main Loading Candy After creating Candy Loading Gum After Class.forName("com.zejian.Gum")Loading Cookie After creating Cookie Process finishedwithexit code0 从结果来看,new一个Candy对象和Cookie对象,构造函数将被调用,属于静态方法的引用,Candy类的Class对象和Cookie的Class对象肯定会被加载,毕竟Candy实...
// local inner class inside the method class Logger { // able to access enclosing class variables String name = s_main_class; // able to access non-final method variables String name1 = s_print_method; public void foo() { String name1 = s_print_method; ...
Let’s declare an interface inside ourOuterclass: public class Outer { interface HelloOuter { public String hello(String name); } } It will generate a new class file with the name:OuterClass$StaticNestedClass 5. Enums Theenumwas introduced in Java 5. It’s a data type that contains a ...