1. 5
1
15
16
20
23

2. 5
 array
Element)
Index)

3. 5
 5.1
array 1
array
array[
array];

4. 5
 5.2
int [] abc , xyz;
abc = new int[500];
xyz = new int[10];
int[] abc = new int
[500], xyz = new
int[10];
***
int [] a , b ; a
b
Array
int a[], b ; a
Array
b
Array

5. 5
 5.3
1
array
{}
,(comma)
int a[5] = {10,20,30,40,50 } ;
1

6. 5
 5.4
Element
Element
0
scores
Element
scores[0]
Element
for (i=0;<9;i++)
scores[i]…;

7. 5
 5.5
Array
Array ( Reference )
Method
Parameter
Method

8. 5
 5.6

reference
Class
Object

9. 5
 5.7
•
(
2
2
Row
, Column (
2
•
2
array
array of array
array 1
array 2

10. 5
 5.8
ArrayList
ArrayList
array
ArrayList
***
import
 import java.util.ArrayList;

11. 5
 method
 1.add(
,
 2.remove(
 3.get(
 4.indexOf(
 5.
size()

12. 5
5.9
String)
Object)
Class String)
String str = new String(“Java”);
String str = “Java”;
2
2
Null Character
„0‟

13. 5
 5.10
String
equals( )
method
String Class
String 2

14. 5
 5.11
1.
class
String
String Class
StringBuffer Class
Constructor
3 Constructor
- StringBuffer()
StringBuffer
16

15. 5
- StringBuffer(int length)
StringBuffer
length
- StringBuffer(String str)
StringBuffer
Argument “str”
str
 2.
StringBuffer
StringBuilder
StringBuffer
Thread Save