Categories of Java and Program using two classes.

In this article,Categories of Java and Program using two classes explained in detail with examples. we will come to know about the information on how methods are created and categorized with examples provided with output and code file.

Based on return type and parameters,methods in java are categorized into 4 type.

• Methods without return type and without parameters.
• Methods without return type and with parameters.
• Methods with return type and without parameters.
• Methods with return type and with parameters. 

//Program based on Categories of Java and Program using two classes.

class example                (From the topic Categories of Java and Program using two classes)

{

//without return type and without parameters.

void diff()

{

int a,b,c;

a=100;

b=25;

c=a-b;

System.out.println("Difference is"+c);

}

//without return type and with parameters.

void prod(int a,int b)

{

int c;

c=a*b;

System.out.println("product is"+c);

}

//with return type and without parameters.

int div()

{

int a,b,c;

a=100;

b=12;

c=a/b;

return c;

}

//with return type and with parameters.

int sum(int a,int b,int c)

{

int total;

total=a+b+c;

return total;

}

public static void main(String args[])

{

int t;

example obj=new example();

obj.diff();

obj.prod(12,5);

t=obj.div();

System.out.println("Division is"+t);

System.out.println("Sum is"+obj.sum(96,84,73));

}

}

Output

Difference is75

product is60

Division is8

Sum is253

                            To get the code file use me.

Java program using two classes.

In a single java program,we can write more than one class(We can use two classes), but before saving the program make sure that the class which contains method, is same as that of the program name.

Ex:                               (From the topic Categories of Java and Program using two classes)

//Java program using Categories of Java and Program using two classes.

class RectangleArea //here the file should be saved as RectanlgeArea.java

{

public static void main(String args[])

{

int a1,a2;

Rectangle obj1=new Rectangle();

Rectangle obj2=new Rectangle();

obj1.len=5;

obj1.bred=10;

a1=obj1.len*obj1.bred;

obj2.getdata(10,20);

a2=obj2.rectarea();

System.out.println("Area1 is"+a1);

System.out.println("Area2 is"+a2);

}

class Rectangle

{

int len,bred;

void getdata(int x,int y)

{

len=x;

bred=y;

}

int rectarea()

{

int area=len*bred;

return area;

}

}

save the file using classname.java(i.e,RectangleArea.java).

Output

Area1 is50

Area2 is200

                          To get the code file use me.

Continue to next topic Java variables and program of variables.

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