注意:Test.java 使用或覆盖了已过时的 API。
注意:要了解详细信息,请使用 -Xlint:deprecation 重新编译。
我再学多态时编了三个JAVA文件,前两个都通过编译了,可最后一个却出现上面的情况。大家给点执教阿 !
注意:要了解详细信息,请使用 -Xlint:deprecation 重新编译。
我再学多态时编了三个JAVA文件,前两个都通过编译了,可最后一个却出现上面的情况。大家给点执教阿 !
----------------------------
使用的方法过时,不建议使用,看doc,有替代的方法
String name;
int age;
public String getName(){
return name;
}
public int getAge(){
return age;
}
}class Student extends Person{
String name;
int age;
public Student(String _name,int _age){
name=_name;
age=_age;
}
public String getName(){
return name;
}
public int getAge(){
return age;
}
}class Teacher extends Person{
String name;
int age;
public Teacher(String _name,int _age){
name=_name;
age=_age;
}
public String getName(){
return name;
}
public int getAge(){
return age;
}
}
public class Test{
public void run(Person p){
System.out.println("你的姓名是:"+p.getName()+"\n");
java.util.Date d = new java.util.Date();
System.out.println("你出生于:"+(d.getYear()+1900-p.getAge()));
}
public static void main(String[] args){
String s1=args[0];
int _age=Integer.parseInt(args[1]);
Student s = new Student(s1,_age);
Test t = new Test();
t.run(s);
}
}
就是上面的代码!
Deprecated. As of JDK version 1.1, replaced by Calendar.get(Calendar.YEAR) - 1900.
建议你用Calendar.get(Calendar.YEAR) - 1900
import java.util.Calendar;class Person { String name; int age; public String getName() { return name;
} public int getAge() { return age;
}
}class Student extends Person { String name; int age; public Student(String _name, int _age) { name = _name; age = _age;
} public String getName() { return name;
} public int getAge() { return age;
}}class Teacher extends Person { String name; int age; public Teacher(String _name, int _age) { name = _name; age = _age;
} public String getName() { return name;
} public int getAge() { return age;
}}public class Test { public void run(Person p) { System.out.println("你的姓名是:" + p.getName() + "\n");
Calendar ca = Calendar.getInstance();
System.out.println("你出生于:" + (ca.get(Calendar.YEAR) - p.getAge())); } public static void main(String[] args) { String s1 = args[0];
int _age = Integer.parseInt(args[1]); Student s = new Student(s1, _age);
Test t = new Test();
t.run(s); }}
args[0]和args[1]分别代表的什么意思希望你能弄明白阿!
如果你给一个正确的参数那么这个程序就正确了阿
如下在eclipse3.1下边一运行了:
class Person{
String name;
int age; public String getName(){
return name;
}
public int getAge(){
return age;
}
} class Student extends Person{
String name;
int age;
public Student(String _name,int _age){
name=_name;
age=_age;
}
public String getName(){
return name;
}
public int getAge(){
return age;
}
} class Teacher extends Person{
String name;
int age;
public Teacher(String _name,int _age){
name=_name;
age=_age;
}
public String getName(){
return name;
}
public int getAge(){
return age;
}
} public class Test{
public void run(Person p){
System.out.println("你的姓名是:"+p.getName()+"\n");
java.util.Date d = new java.util.Date();
System.out.println("你出生于:"+(d.getYear()+1900-p.getAge()));
}
public static void main(String[] args){
String s1="javaStudy";
int _age=20;
Student s = new Student(s1,_age);
Test t = new Test();
t.run(s);
}
}
import java.util.GregorianCalendar;
class Person{
String name;
int age; public String getName(){
return name;
}
public int getAge(){
return age;
}
} class Student extends Person{
String name;
int age;
public Student(String _name,int _age){
name=_name;
age=_age;
}
public String getName(){
return name;
}
public int getAge(){
return age;
}
} class Teacher extends Person{
String name;
int age;
public Teacher(String _name,int _age){
name=_name;
age=_age;
}
public String getName(){
return name;
}
public int getAge(){
return age;
}
} public class Test{
public void run(Person p){
System.out.println("你的姓名是:"+p.getName()+"\n");
GregorianCalendar d = new GregorianCalendar();
System.out.println("你出生于:"+(d.DAY_OF_YEAR+1900-p.getAge()));
}
public static void main(String[] args){
String s1=args[0];
int _age=Integer.parseInt(args[1]);
Student s = new Student(s1,_age);
Test t = new Test();
t.run(s);
}
}