Java泛型
Java泛型
- 泛型的本质是参数化类型，就是将类型由原来具体的类型参数化，然后在调用时传入具体类型
- 泛型类：
public class Student {//定义泛型类
private T t;
public void setT(T t) {
this.t = t;
}
public T getT {
return t;
}
}
public class Main {
public static void main(String[] args) {
Student s1 = new Student();
s1.setT("纱雾");
System.out.println(s1.getT());
Student s2 = new Student();
s2.setT(11);
System.out.println(s2.getT());
}
}
- 泛型方法:
public class Student {
public void show(T t) {//定义泛型方法
System.out.println(t);
}
}
public class Main {
public static void main(String[] args) {
Student s = new Student();
s.show("纱雾");
s.show(11);
}
}
- 泛型接口：
public interface Person {//定义泛型接口
void show(T t);
}
public class Student implements Person {//定义泛型接口的实现类
public void show(T t) {
System.out.println(t);
}
}
public class Main {
public static void main(String[] args) {
Student s1 = new Student();
s1.show("纱雾");
Student s2 = new Student();
s2.show(11);
}
}
