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Browse CoursesA company is validating usernames for its internal employee portal Every employee enters their full name as a string like “john_123” your job is to write a program that does the following: 1. Accept a string that represents a username 2. Check if the username (i) contains only lowercase letters, digits […]
JAVA class main { public static void main(String args[]) { String a=”java”; char target=’a’; int count=0; for(int i=0; i<a.length(); i++)//4<4 { if(a.charAt(i)==target)//a==a count++;//2 } System.out.println(count);//2 } }
1)Reverse each word in a sentence input: java is fun output:avaj si nuf import java.util.*; class ASC { public static void main(String args[]) { String a=”java is fun”; String b[]=a.split(” “);//b[java–>0 is–>1 fun–>2] for(String c:b)//c=fun { StringBuilder s=new StringBuilder(c);//(fun) System.out.print(s.reverse()+” “);//avaj si nuf } } } ———————————– […]
Missing Attendance roll number: Given roll numbers from 1 to N,one is missing. Find the missing number int rolls[]={1,2,3,5} output: Missing number=4 —————————————————————————— 2)Find Duplicate ID: In an employee array, one ID is duplicated. Find that duplicate int empIDs={101, 103, 104, 101, 105} output: Duplicate: 101 class DuplicateID { […]
import java.util.*; class ASC { static int count(int num) //num=0 { if(num==0)//0==0(f) return 0; else return 1+count(num/10);1/10 } public static void main(String args[]) { int num=12345; int result=count(num);//5 System.out.println(result);//5 } }
Java example program import java.util.*; class ASC { static int sum(int n)//5 { if(n==0)//0==0 return 0; else return n+sum(n-1); } public static void main(String args[]) { int result=sum(5); System.out.println(result); } }
–>Should be able to define a solution of a problem in terms of solution of similar problems   –>Proper terminating condition Factorial==> 5!=>5x4x3x2x1 5!=5×4! 4!=4x3x2x1 4!=4×3! cimport java.util.*; class ASC {  static int fact(int n)//5  {   if(n==0)   return 1;   else   return n*fact(n-1);  } public static void main(String […]
import java.util.*; class ASC { public static void main(String args[]) { Scanner s=new Scanner(System.in); int amount; while(true) { System.out.println(“enter the amount to withdraw”);//2300 amount=s.nextInt();//2300 if(amount==0) { System.out.println(“exiting…”); break; } if(amount%100!=0)2300%100==>00!=0 { System.out.println(“Invalid amount…”); } int a=amount/2000; amount=amount%2000; int b=amount/500; amount=amount%500; int c=amount/100; amount=amount%100; if(a>0) System.out.println(a+”x2000″); if(b>0) […]
import java.util.*; class Bank { public static void main(String args[])
Wrapper classes in java: A wrapper class in java is a class whose objects wraps or contains primitive datatypes Need: They convert primitive datatypes into objects In collection framework, such as Arraylist and sets,will store only objects and not primitive datatypes Primitive datatypes Wrapper classes char————————Character int————————-Integer float———————–Float double———————–Double […]
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