Topic Posts – Computer Sir Ki Class

Java All : Character Handling

Concept Learning Code Sheets

Character Storage as a Number #3520

Demonstration of how a character is also stored like a number only.

Character and Integer Inter-conversion by implicit and explicit type casting #3522

Demonstration of how a character and integer can be inter-converted by implicit and explicit style of type casting.

Character Boxing (Converting to object of Character Class) #3526

Converting a character to it equivalent Wrapper class object so that many methods can be applied on it.

Character isMethods isDigit isLetter isLetterOrDigit isLowerCase isUpperCase isWhitespace #3531

Using isMethods on character like isDigit(), isLetter(), isLetterOrDigit, isUpperCase(), isLowerCase(), isWhitespace() and getting the boolean or true/false status returned

Exam Paper Problems

isUpperCase() toUpperCase() comparison #4019

( As In Exam - ICSE2018 )

Write a difference between the functions isUpperCase() and toUpperCase().

isLetterOrDigit() replace() function #4256

( As In Exam - ICSE2016 )

Write the return type of the following library functions :
(i) isLetter

Write the return type of the following library functions :
(i) isLetterOrDigit(char)
(ii) replace(char,char)

Using toUpperCase() of Character Wrapper #7223

( As In Exam - ICSE2017 )

State the data type and value of res after the following is executed:
c

State the data type and value of res after the following is executed:
char ch=’t’;
res= Character.toUpperCase(ch);

Solved Problems

Count isLetter set in the ASCII code set #3549

Write a java program to count the number of letters in the ascii character ra

Write a java program to count the number of letters in the ascii character range 0 to 127 using the isLetter method of Character wrapper class.

Code Sheets:4 Exam Paper Problems:3 Solved Problems:1

Introductory Sessions Beginning to Program Tokens Keywords Identifiers Literals Data Types Variables and Constants Operators (Arithmetic-Assignment-Unary-Relational-Logical) Expressions Statements and Formula Based Calculations BlueJ User Input Arguments through main Class Object Creation and Access Wrapper Classes Constructor Basics Constructor Overloading Conversion and Checking Functions Math Functions Function building and calling Function overloading Simple If and If-Else Selection Multiple Conditional Selections Switch Based Selections Basic Loop Types Compound or Nested Loops Jumping within loops Loop Variations Loop Applications - Handling Numerals Specially Named Numbers Series Printing Pattern Printing Scanner Input Buffered Input Array Basics Array Search Array Sorting Other Array Manipulations Two Dimensional Arrays Basics Two Dimensional Arrays Manipulations Character Handling String Basics String Class Functions StringBuffer StringBuilder Types of Errors Exceptions using try-catch Defining Classes



Example(s):Palindrome, prime, armstrong, "linear search", reverse etc.


Example(s):1575, 1632, 1539 (Only one at a time)

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