Java 的入口函数:
public static void main(String args[])
其中,括号中的参数是不可以省略的。另外,每个.java文件中有且仅有一个 属性为 public 的 class 。
继承与接口示例:
public class PhoneTest{
public static void main(String[] args){
MobilePhone mobilephone = new MobilePhone();
StablePhone stablephone = new StablePhone();
LinePhone linephone = new LinePhone();
mobilephone.move();
}
}
abstract class Phone{
Phone(){
System.out.println("This is Phone!");
}
}
interface canMove{
public void move();
}
class MobilePhone extends Phone implements canMove{
MobilePhone(){
super();
System.out.println("This is MobilePhone!");
}
public void move() {
System.out.println("MobilePhone can move!");
}
}
class StablePhone extends Phone{
StablePhone(){
super();
System.out.println("This is StablePhone!");
}
}
class LinePhone extends StablePhone{
LinePhone(){
super();
System.out.println("This is LinePhone!");
}
}