Java Reference
In-Depth Information
TIP: (continued)
public String getBalance()
{...}
...
} //End of BankAccount
This invocation of getBalance is within the definition of the inner class Money . But the
inner class Money has no method named getBalance , so it is presumed to be the method
getBalance of the outer class BankAccount .
But suppose the inner class did have a method named getBalance ; then this invoca-
tion of getBalance would be an invocation of the method getBalance defined in the
inner class.
If both the inner and outer classes have a method named getBalance , then you can
specify that you mean the method of the outer class as follows:
public void showBalance()
{
System.out.println(
BankAccount. this .getBalance());
}
The syntax
Outer_Class_Name . this . Method_Name
always refers to a method of the outer class. In the example, BankAccount.this means
the this of BankAccount , as opposed to the this of the inner class Money .
Self-Test Exercises
26. Consider the following class definition:
public class OuterClass
{
public static class InnerClass
{
public static void someMethod()
{
System.out.println("From inside.");
}
}
Other_Members_of_OuterClass
}
Write an invocation of the static method someMethod that you could use in some
class you define.
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