Java Method Parameters
Description
Parameters allow a method to be generalized by operating on a variety of data and/or be used in a number of slightly different situations.
Syntax
This is the general form of a method:
type methodName(parameterType variable,parameterType2 variable2,...) {
// body of method
}
Example 1
A parameterized method can operate on a variety of data.
The new Rectangle class has a new method which
accepts the dimensions of a rectangle and sets the
dimensions with the passed-in value.
class Rectangle {
double width;/* w ww . ja v a2 s . co m*/
double height;
double area() {
return width * height;
}
void setDim(double w, double h) { // Method with parameters
width = w;
height = h;
}
}
public class Main {
public static void main(String args[]) {
Rectangle mybox1 = new Rectangle();
double vol;
mybox1.setDim(10, 20);
vol = mybox1.area();
System.out.println("Area is " + vol);
}
}
The output:
Example 2
The following code passes objects to methods.
class Test {/*from w w w . j a v a2 s . c o m*/
int a;
Test(int i) {
a = i;
}
boolean equals(Test o) {
if (o.a == a )
return true;
else
return false;
}
}
public class Main {
public static void main(String args[]) {
Test ob1 = new Test(100);
Test ob2 = new Test(100);
System.out.println("ob1 == ob2: " + ob1.equals(ob2));
}
}
This program generates the following output:
