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    <p>An instance variable is a variable that is a member of an instance of a class (i.e associated with something created with a <code>new</code>), whereas a class variable is a member of the class itself.</p> <p>Every instance of a class will have its own copy of an instance variable, whereas there is only 1 of each static (or class) variable, associated with the class itself.</p> <p><a href="http://www.programmerinterview.com/index.php/c-cplusplus/whats-the-difference-between-a-class-variable-and-an-instance-variable/">difference-between-a-class-variable-and-an-instance-variable</a></p> <p>This test class illustrates the difference</p> <pre><code>public class Test { public static String classVariable="I am associated with the class"; public String instanceVariable="I am associated with the instance"; public void setText(String string){ this.instanceVariable=string; } public static void setClassText(String string){ classVariable=string; } public static void main(String[] args) { Test test1=new Test(); Test test2=new Test(); //change test1's instance variable test1.setText("Changed"); System.out.println(test1.instanceVariable); //prints "Changed" //test2 is unaffected System.out.println(test2.instanceVariable);//prints "I am associated with the instance" //change class variable (associated with the class itself) Test.setClassText("Changed class text"); System.out.println(Test.classVariable);//prints "Changed class text" //can access static fields through an instance, but there still is only 1 //(not best practice to access static variables through instance) System.out.println(test1.classVariable);//prints "Changed class text" System.out.println(test2.classVariable);//prints "Changed class text" } } </code></pre>
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    1. COcorrect. You can also think of an instance variable as a `field` in an object. A relevant concept is encapsulation (see: `private` access modifier, getters and setters...)
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    2. COIndeed, i have declared most things public for easy access, this is usually a bad idea
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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