In Java, inner classes are defined within the body of another class, while nested classes are defined as static members of a class. Inner classes have access to their enclosing class's members, while nested classes do not. Here's a simple example demonstrating both types of classes:
class Outer {
private String outerField = "Outer Field";
// Inner class
class Inner {
void display() {
System.out.println("Accessing: " + outerField);
}
}
// Nested static class
static class Nested {
void display() {
System.out.println("This is a static nested class.");
}
}
}
public class Main {
public static void main(String[] args) {
Outer outer = new Outer();
Outer.Inner inner = outer.new Inner();
inner.display(); // Accessing: Outer Field
Outer.Nested nested = new Outer.Nested();
nested.display(); // This is a static nested class.
}
}
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