public class 类名<泛型表示符号> {
}
public interface 接口名<泛型表示符号> {
}
public <泛型表示符号> void setName(泛型表示符号 name){
}
public <泛型表示符号> 泛型表示符号 getName(泛型表示符号 name){
}

public class Test {

    public static class IgenericImpl implements Igeneric<String> {
        @Override
        public String getName(String name) {
            return name;
        }
    }

    public static class MethodGeneric {
        public <T> void setName(T name){
            System.out.println(name);
        }
        public <T> T getName(T name){
            return name;
        }
    }

    public static void main(String[] args) {
        MethodGeneric methodGeneric = new MethodGeneric();
        methodGeneric.setName("oldlu");
        methodGeneric.setName(123123);

        MethodGeneric methodGeneric2 = new MethodGeneric();
        String name = methodGeneric2.getName("Bjsxt");
        Integer name1 = methodGeneric2.getName(123);
        System.out.println(name);
        System.out.println(name1);

       /* IgenericImpl igeneric= new IgenericImpl();
        String name = igeneric.getName("2023");
        System.out.println(name);
        Igeneric<String> igeneric1 = new IgenericImpl();
        String name1 = igeneric1.getName("20231020");
        System.out.println(name1);*/

        /*Generic<String> generic = new Generic<>();
        generic.setFlag("admin");
        String flag = generic.getFlag();
        System.out.println(flag);

        Generic<Integer> generic1 = new Generic<>();
        generic1.setFlag(100);
        Integer flag1 = generic1.getFlag();
        System.out.println(flag1);*/
    }
}

interface Igeneric<T> {
    T getName(T name);
}

class Generic<T> {
    private T flag;

    public void setFlag(T flag) {
        this.flag = flag;
    }

    public T getFlag() {
        return this.flag;
    }
}