Methods in Java

What is method?

What is the advantages of using methods?

What is method prototype?

What is method signature?

What is formal parameter?

What is actual parameter?

Code 01

1. import java.util.Scanner;
2. public class ParkingLot 
3. {
4. int vno;
5. int hours;
6. double bill;
7. public static void main(String args[])
8. {
9. ParkingLot ob = new ParkingLot();
10. ob.input();
11. ob.calculate();
12. ob.display();
13. }
14. void input()
15. {
16. Scanner sc = new Scanner(System.in);
17. System.out.print("Enter the vehicle number: ");
18. vno = sc.nextInt();
19. System.out.print("Enter the hours vehicle is parked: ");
20. hours = sc.nextInt();
21. }
22. void calculate()
23. {
24. if(hours<=1)
25. bill = 3;
26. else
27. bill = 3+(hours-1)*1.5;
28. }
29. void display()
30. {
31. System.out.println("Vehicle Number = "+vno);
32. System.out.println("Hours Parked = "+hours);
33. System.out.println("Bill Amount = "+bill);
34. }
35. }

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Code 02:

1. import java.util.Scanner;
2. public class FunctionOverload 
3. {
4. void compare(int a,int b)
5. {
6. if(a>b)
7. System.out.println(a+" is greater.");
8. else if(a<b)
9. System.out.println(b+" is greater.");
10. else
11. System.out.println("Both are equal.");
12. }
13. void compare(char a,char b)
14. {
15. if((int)a>(int)b)
16. System.out.println(a+" is greater.");
17. else if((int)a<(int)b)
18. System.out.println(b+" is greater.");
19. else
20. System.out.println("Both are equal.");
21. }
22. void compare(String a,String b)
23. {
24. int l1 = a.length();//6
25. int l2 = b.length();//7
26. if(l1>l2)
27. System.out.println(a+" is greater in length");
28. else if(l1<l2)
29. System.out.println(b+" is greater in length");
30. else
31. System.out.println("Both are equal");
32. }
33. public static void main(String args[])
34. {
35. FunctionOverload ob = new FunctionOverload();
36. Scanner sc = new Scanner(System.in);
38. int p,q;
39. p = sc.nextInt();
40. q = sc.nextInt();
41. ob.compare(p,q);
43. char ch1,ch2;
44. ch1 = sc.next().charAt(0);
45. ch2 = sc.next().charAt(0);
46. ob.compare(ch1,ch2);
48. String s1,s2;
49. s1 = sc.next();
50. s2 = sc.next();
51. ob.compare(s1,s2);
52. }
53. }