Interface in java
// interface syntax
interface InterfaceName
{
fields // by default interface fields are public, static final
methods // by default interface methods are abstract, public
}Interface in java
// interface syntax
interface InterfaceName
{
fields // by default interface fields are public, static final
methods // by default interface methods are abstract, public
}Interface in Java Implementation
interface Moveable
{
int AVG_SPEED = 40;
void move();
}
class Vehicle implements Moveable
{
public void move()
{
System.out.println ("Average speed is"+AVG-SPEED");
}
public static void main (String[] arg)
{
Vehicle vc = new Vehicle();
vc.move();
}
}how to declare a interface in java
// Assume we have the simple interface:
interface Appendable {
void append(string content);
}
// We can implement it like that:
class SimplePrinter implements Appendable {
public void append(string content) {
System.out.println(content);
}
}
// ... and maybe like that:
class FileWriter implements Appendable {
public void append(string content) {
// Appends content into a file
}
}
// Both classes are Appendable.
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