Java extracting individual data from an object list

Question

I have a Java Class like this:

public class Employee {
  String Name;
  int Id;
  int Age;

  void setName(String tempVal) {
    Name = tempVal;
    System.out.println(Name);
    System.out.println("\n");
  }

  void setId(int parseInt) {
    Id = parseInt;
    System.out.println(Id);
    System.out.println("\n");
  }

  void setAge(int parseInt) {
    Age = parseInt;
    System.out.println(Age);
    System.out.println("\n");
  }

}

Now I want to parse a employees.xml file using SAXParser using the code in the link: http://totheriver.com/learn/xml/xmltutorial.html#5.2

The problem is when I am adding the tempEmp to the list and accessing the list to print its value in printData() method, the output is something like:

No of Employees '3'.

Employee@140de537

Employee@1c43882a

Employee@15a08be5

Now, how do I extract the name, age and id of the employee individually?

Better override toString() method, and print Name, Age and Id of employees in that — Pradeep Simha
– Pradeep Simha, Commented Jan 13, 2013 at 14:54
Just add getter methods? stackoverflow.com/tags/javabeans/info Also work on your naming conventions, please. — BalusC
– BalusC, Commented Jan 13, 2013 at 15:05

Renjith · Accepted Answer · 2013-01-13 15:02:18Z

2

I guess you are adding the Employee object to the list and printing the objects directly from list.If you dont override the toString() method, it will call the toString() method of Object class(superclass of all class), which will be returing the classname@hashcode(hashcode of object).If you want to print some data from your class, you need to override toString() method in your class and return the format you require.

answered Jan 13, 2013 at 15:02

Renjith

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9 Comments

Akshat Aggarwal Over a year ago

yaa rite i got you point.. but i have another doubt.. if i want to just access the value rather than printing it.. then what to do? as in say i want to assign a variable int agee= age of the employee, how would i do that?

Renjith Over a year ago

Just like the set methods you have, you have to implement getters also. public String getName() { return Name; } public int getAge() { return Age; } public int getId() { return Id; } Then you can access any data like int age = yourEmployeeObject.getAge() Hope this helps..

Akshat Aggarwal Over a year ago

i am not able to extract the age values from the get methods. i implemented get methods in the same manner u said. the i m doing: int age=myEmpls.get(0).getAge();, where myEmpls is the name of the list. can u please help?

Renjith Over a year ago

can you show me the code?(where you are declaring your List and getter methods)Remember, the getter methods must be public

Akshat Aggarwal Over a year ago

totheriver.com/learn/xml/code/SAXParserExample.java totheriver.com/learn/xml/code/Employee.java these are the codes... now in printdata method in SAX.java one, if i change the line it.next().toString() to it.next().getAge() it throws an error

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Óscar López · Accepted Answer · 2013-01-13 14:54:50Z

2

You have to implement a toString() method in the Employee class for it to be displayed correctly, something along these lines:

@Override
public String toString() {
    return Id + " " + Name + " " + Age;
}

Also, remember that in Java attribute names should start with a lowercase character, not uppercase.

answered Jan 13, 2013 at 14:54

Óscar López

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5 Comments

Akshat Aggarwal Over a year ago

can u please tell me how to do that... i am new to java

Akshat Aggarwal Over a year ago

and if i need to extract the data individually one by one... as in something like it.next().Name,it.next.Id etc.. i mean in general can u tell me what exactly is the format of the it.next() element??

Sanchit Over a year ago

Adding in this toString() method in your Employee class will solve your problem. It tells java to run this function every time you try to print an object of type Employee.

Akshat Aggarwal Over a year ago

but what if i dont want to print... i just want to access the value and store it somewhere.. how to do it then?

Sanchit Over a year ago

Whatever you are using to learn Java, READ it. You need to know the basics of how to program before coming to SO.

Will · Accepted Answer · 2013-01-13 14:56:16Z

2

You want to add some getter methods.

You should also check out the code conventions for Java - some of your variables start with an uppercase letter where they should not.

answered Jan 13, 2013 at 14:56

Will

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Comments

jco.owens · Accepted Answer · 2013-01-13 15:05:46Z

1

To get each value individually, you need to add a few get methods

public String getName()
{
  return Name;
}

public int getAge()
{
  return Age;
}

public int getId()
{
  return Id;
}

answered Jan 13, 2013 at 15:05

jco.owens

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