java泛型类实例

楼主要的是自定义的泛型类，楼上的怎么都是人家jdk自带的啊！
我的代码
public class JavaBean<K> {
private String userName = "";
private String passWord = "";
private int age = 0;
private K k = null;

public JavaBean(){

}

/**
* @return the age
*/
public int getAge() {
return age;
}

/**
* @param age the age to set
*/
public void setAge(int age) {
this.age = age;
}

/**
* @return the passWord
*/
public String getPassWord() {
return passWord;
}

/**
* @param passWord the passWord to set
*/
public void setPassWord(String passWord) {
this.passWord = passWord;
}

/**
* @return the userName
*/
public String getUserName() {
return userName;
}

/**
* @param userName the userName to set
*/
public void setUserName(String userName) {
this.userName = userName;
}

public K getString(){
return k;
}

/**
* @param k the k to set
*/
public void setK(K k) {
this.k = k;
}
}

---------------------test
public class TestMain {

public static void main(String[] args) {
JavaBean<Integer> bean2 = new JavaBean<Integer>();
bean2.setK(3);

JavaBean<String> bean1 = new JavaBean<String>();
bean1.setK("hello");
}
}

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