Program: Method Overloading
class OverloadDemo
{
void test()
{
System.out.println("No parameters");
}
// Overload test for one integer parameter.
void test(int a)
{
System.out.println("a: " + a);
}
// Overload test for two integer parameters.
void test(int a, int b)
{
System.out.println("a and b: " + a + " " + b);
}
// overload test for a double parameter
double test(double a)
{
System.out.println("double a: " + a);
return a*a;
}
}
class Overload
{
public static void main(String args[])
{
OverloadDemo ob = new OverloadDemo();
double result;
// call all versions of test()
ob.test();
ob.test(10);
ob.test(10, 20);
result = ob.test(123.25);
System.out.println("Result: " + result);
}
}
Program: Method Overriding
class A
{
int i, j;
A(int a, int b) {
i = a;
j = b;
}
void show() // display i and j
{
System.out.println("i and j: " + i + " " + j);
}
}
class B extends A
{
int k;
B(int a, int b, int c)
{
super(a, b);
k = c;
}
void show()
{
System.out.println("k: " + k);
}
}
class Override {
public static void main(String args[])
{
B subOb = new B(1, 2, 3);
subOb.show(); // this calls show() in B
}
}
