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访问修饰符图
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final 有什么用?
不可修改 不可被重写(可以重载!) 不可继承 -
final finally finalize区别
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super关键字的用法
class Person{
protected String name;
public Person(String name) {
this.name = name;
}
}
class Student extends Person{
private String name;
public Student(String name, String name1) {
super(name);
this.name = name1;
}
public void getInfo(){
System.out.println(this.name); //Child
System.out.println(super.name); //Father
}
}
public class Test {
public static void main(String[] args) {
Student s1 = new Student("Father","Child");
s1.getInfo();
}
}
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this与super的区别
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在 Java 中,如何跳出当前的多重嵌套循环
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BIO,NIO,AIO 有什么区别?
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什么是反射机制?