java string , array , string methods #short смотреть онлайн

ARRAYS, STRINGS AND VECTORS
ARRAY : AN ARRAY IS A GROUP OF CONTYIGUOUS ITEMS THAT SHARE A COMMON NAME. SET OF VALUES . COLLECTION OF ITEMS.
THE INDIVIDUAL VALUES CALLED A ELEMENT.
TYPES OF ARRAY :
ONE DIMENSIONAL ARRAYS: A LIST OF ITEMS CAN BE GIVEN ONE VARIABLE NAME USING ONLE ONE SUBSCRIPT AND SUCH A VARIABLE IS CALLED SINGLE DIMENSIONAL ARRAY.
EX: A[5];
HOW TO CREATE AN ARRAY:
1- DECLARE THE ARRAY
2- CREATE MEMORY LOCATIONS
3- PUT VALUES INTO THE MEMORY LOCATIONS.
CREATION OF ARRAY: ARRAYNAME = NEW TYPE[SIZE];
NUMBER = NEW INT[5];
INITIALIZE OF THE ARRAY: WE PUT THE VALUES IN THE CREATED ARRAY. THIS PROCESS IS CALLED INTIALIZATION OF ARRAY.

ARRAY LENGTH : THE ALLOCATED SIZE IN A VARIABLE NAMED LENGTH.
INT ASIZE = A.LENGTH;
Two – Dimensional array: variable can store a list of values.
A[3][3]

String : most common part of java programs. String represent sequence of characters.
String strname;
String fname;
String fname = new String(“CoderUmax”);
// check length of the string
Int m = fname.length();
String of array:
String item[] = new String[3];
String methods :
Lowercase : s2 = s1.toLowerCase;
Convert all string letter in lowercase
Uppercase : s2 = s1.toLowerCase;
Convert all string letter in lowercase
s2 = s1.toUpperCase;
Convert all string letter in uppercase
S2=s1.replace(‘x’,’y’) ;
Replace all appereences x with y
S2=s1.trim()
S1.equals(s2);
S1.equlasIgnoreCase(s2);
S1.length();
S1.CharAr(n)
Gives nth character of s1
S1.compapreTo(s2);
S1.concat(s2);
S1.substring(n);
Gives substring from nth character
S1.substring(n,m);
Gives substring from nth character up to mth not including
String.ValueOf(p);
Create a string object of the paramenter.
p.toString();
gives the string representation object p
#java
#computerscience
#javaprogramming
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