StackOverflow2013

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PO
primarykey
Id
9771729
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
2
CommunityOwnedDate
CreationDate
2012-03-19T14:12:40.527
FavoriteCount
0
LastActivityDate
2012-03-19T14:36:35.137
LastEditDate
2012-03-19T14:36:35.137
LastEditorUserId
276052
OwnerUserId
276052
ParentId
9771688
PostTypeId
2
Score
4
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0
LastEditorDisplayName
text
Body
This line <pre><code>System.out.println(stud); </code></pre> is equivalent1 to <pre><code>System.out.println(stud.toString()); </code></pre> Since <code>String</code> <a href="http://docs.oracle.com/javase/tutorial/java/IandI/override.html" rel="nofollow">overrides</a> the <a href="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html#toString%28%29" rel="nofollow"><code>Object.toString</code></a> method you get something more meaningful than a bunch of characters and digits when printing strings. You could let your user-defined classes do this too. In your <code>Student</code> class it would look like this: <pre><code>class Student{ int age; public void setAge(int age){ this.age=age; } public int getAge(){ return age; } @Override public String toString() { // Called for instance when return "Student with age " + age; // the student should be printed } } </code></pre> Here's an <a href="http://ideone.com/5NLmB" rel="nofollow">ideone.com demo</a> for a run with your code where <code>Student</code> overrides <code>toString</code>. Further reading: <ul> <li>Documentation for <a href="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html#toString%28%29" rel="nofollow"><code>Object.toString</code></a> (the fall-back method for classes that do not override it)</li> <li>Documentation for <a href="http://docs.oracle.com/javase/6/docs/api/java/io/PrintStream.html#println%28java.lang.Object%29" rel="nofollow"><code>PrintStream.println</code></a></li> <li><a href="http://www.javapractices.com/topic/TopicAction.do?Id=55" rel="nofollow">Implementing toString</a></li> </ul> 1) Unless stud equals null
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1. POJava- difference between String object and user defined objects
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1. POJava- difference between String object and user defined objects
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1. COPerhaps you can do this by implementing as such: return "My age is: "+age;
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