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Java学习泛型之泛型类

泛型类

泛型类的定义格式:

格式:修饰符class类名<类型>{}

范例:public class Generic<T>{}

        此处T可以随意为任意标识,常见的如:T、E、K、V等形式的参数常用于表示泛型

package com.itheima_95;

public class Generic<T> {
private T t;

public T getT() {
return t;
}

public void setT(T t) {
this.t = t;
}
}
package com.itheima_95;
/*
测试类
*/
public class GenericDemo {
public static void main(String[] args) {
Student s = new Student();
s.setName("林青霞");
System.out.println(s.getName());

Teacher t = new Teacher();
t.setAge(30);
// t.setAge("30");
System.out.println(t.getAge());
System.out.println("--------");
Generic<String> g1 = new Generic<String>();
g1.setT("林青霞");
System.out.println(g1.getT());
Generic<Integer> g2 = new Generic<Integer>();
g2.setT(30);
System.out.println(g2.getT());
Generic<Boolean> g3 = new Generic<Boolean>();
g3.setT(true);
System.out.println(g3.getT());

}
}
package com.itheima_95;

public class Student {
private String name;

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}
}
package com.itheima_95;

public class Teacher {
private Integer age;

public Integer getAge() {
return age;
}

public void setAge(Integer age) {
this.age = age;
}
}
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