1. method

2. Method
Function
Method
Method Java

3. Class Class Method
Class Class public
main Method

4. Method modifiers
public static
Return_ Type
void
MethodName
parameter
(;)
reture

5. (Type of Method)
1. Static Method -
2. Instance Method -
3. Constructor Method -
4. Overloading Method -
5. Overriding Method -
1. Static Method
static
method(argument);

6. 2. Instance Method
object.method(argument);
object.attribute
3. Constructor Method
constructor
void
Class object = new Class();

7. 4. Overloading Method
overload constructor)
Overloading Method
public int Print(int idbook){...}
public String Print(int bookname){...}
Overloading Constructor
public Circle() {...}
public Circle(int radius) {...}
Output Student

8. 5. Overriding Method
Inheritance)
class Person {
public void print() {System.out.print("People");}
}
class Student extend Person {
public void print() {System.out.print("Student");}
}

9. main()
static
displayMessage()
SimpleMethod.java

11. main

12. hierarchical
A B
B C
C JVM
B JVK
A

13. DeepAndDeeper.java

15. Math
void

16. sqfrt
16
4
area
Math API
Math.pow

17. Math .pow
double
4.0 2.0
3 6 3

18. 4.0 2.0
3 6 3
Math.sqrt
doble
3.0

19. Math.random
0 1

20. MathDemo.java
Math
Random
0.0 1.0
10

21. TenRandomNumber.java
10
1 6

22. random
r
r 0.0 1.0
6.0
1.0 7.0

23. (argument)
(parameter)
parameter_list
PrintCharLine
PrintLine
c
char len int
c
len

24. 1: using System;
2: class ParamNoRet {
3: static void PrintCharLine(char c, int len)
{
4: for (int i = 0; i < len; i++)
5: Console.Write(c);
6: Console.WriteLine();
7: }
8:
9: static void Main() {
10: PrintCharLine(’o’, 10);
11: PrintCharLine(’x’, 20);
12: }
13: }

25. PrintCharLine Main
10 'o' 10
PrintCharLine
c len
4 5
o 10
PrintCharLine
11 x
20

26. 4.4
showSum
void
return
showSum

27. total double

28. 3 4
showSum
return
Add

29. = -32 1.8
double
double

30. (true) (false)
boolean
1 100

31. main main
4.8
4.8 f(x)
= x2 5 x 0 10

32. return

33. 4.9
2 1
isPrime
return 5

34. 6317 7163

35. 4.5 Local
(local variable)
4.10
main()
Phuket rayong
birds
4.10LocalVars.java

36. 4.10

37. 4.11
x main x
one() x
main
x one
x main
4.11Local2.java

38. 4.6 (Overloading Method)
(Overload
Method)
4.12
4.12

40. 4.13 CalGrade.java
75

41. 4.14 BarChart.java
Bar
*

42. 24

43. 1
28
2.
29
3.
32
4.
33
5.
34
6.