1. Instructor: Mainak Chaudhuri mainakc@cse.iitk.ac.in
More Examples
Instructor: Mainak Chaudhuri

2. Checking case class upperCaseCharacter{
public static void main(String arg[]){
char c=‘0’;
boolean isuppercase, islowercase;
isuppercase = ((c >= ‘A’) && (c <= ‘Z’));
islowercase = ((c >= ‘a’) && (c <= ‘z’));
System.out.ptintln(“The character is ” + c + “. Uppercase: ” + isuppercase); }

3. Digits in AP class digitsInAP{ public static void main(String arg[]){
int x = 121;
int d0, d1, d2;
boolean isAP;
d0 = x % 10;
d1 = (x/10) % 10;
d2 = x/100;
isAP = ((d0+d2) == (2*d1));
System.out.println(“The number is: ” + x + “. Digits in AP? ” + isAP); }

4. Divisibility by 4 class divisibleByFour{
public static void main(String arg[]){
int x = 121;
int lastTwoDigits;
boolean isdivBy4;
lastTwoDigits = x%100;
isdivBy4 = ((lastTwoDigits % 4) == 0);
System.out.println(“The number is: ” + x + “. Divisible by 4? ” + isdivBy4); }

5. Exchanging numbers class swapBad{
public static void main(String arg[]){
int x = 121;
int y = 200;
System.out.println(“x: ” + x + “, y: ” + y);
x = x + y; // Could overflow
y = x – y;
x = x – y; }

6. Exchanging numbers class swapGood{
public static void main(String arg[]){
int x = 121;
int y = 200;
int temp;
System.out.println(“x: ” + x + “, y: ” + y);
temp = x;
x = y;
y = temp; }