How to convert string into int primitive data type?

package com.altafjava.test; public class Test { public static void main(String[] args) { String s="526"; int sum=0; for(int i=0;i<s.length();i++){ sum=(sum*10)+(s.charAt(i)-48); } System.out.println("Original...

Write a JAVA program for the given string and take another string and check whether the taken string is substring of given string or not.

/* Write a JAVA program for the given string and take another string and check whether the taken string is substring of given string or not. Given String : google Input String : gle Output : gle is the substring of google */ import java.util.Scanner; class CheckSubstring { public static void main(String[] args) { String s="google"; ...

How to find largest number less than a given number and without a given digit?

For example, If given number 165 and given digit is 6 then you should find the largest number less than 165 but it should not contain 4 in it. In this case  answer is 159. package com.altafjava.test; public class FindLargestNo { public...

How to count occurrences of each character of a string without using Regular Expression in java?

package com.altafjava.coos.test; public class CountOccurrences2 { public static void main(String[] args) { String s="annotation"; System.out.println("Original String = "+s); while(s.length()!=0){ int count=0; for(int i=0;i<s.length();i++){ if(s.charAt(0)==s.charAt(i)) ...

How to count occurrences of each character of a string in java?

package com.altafjava.coocis.test; import java.util.regex.Matcher; import java.util.regex.Pattern; public class CountCountOccurrences { public static void main(String[] args) { String s="annotation"; System.out.println("Original String = "+s); while(s.length()!=0){ int...

How to find second largest number in an integer array?

package com.altafjava.sln.test; public class SecondLargestNumber { public static void main(String[] args) { int[] arr={5,20,8,1,9,2,14,34,11}; int largest=Integer.MIN_VALUE; int secondLargest=Integer.MIN_VALUE; for(int i=0;i<arr.length;i++){ if(arr[i]>largest){ ...

How to find sum of all digits of a number in java?

package com.altafjava.sad.test; public class SumAllDigit { public static void main(String[] args) { int num=9526; System.out.println("Original number = "+num); int sum=0; while(num!=0){ int remainder=num%10; sum=sum+remainder; num=num/10; } System.out.println("Sum...

How to find duplicate elements in an array using HashSet?

package com.altafjava.fdeia.test; import java.util.HashSet; public class Test2 { public static void main(String[] args) { int[] arr={1,6,5,1,2,2,9,6}; System.out.println("Input Array = 1,6,5,1,2,2,9,6");         System.out.print("The repeating elements...

How to find duplicate elements in an array?

package com.altafjava.fdeia.test; public class Test { public static void main(String[] args) { int[] arr={1,6,5,1,2,2,9,6}; System.out.println("Input Array = 1,6,5,1,2,2,9,6");         System.out.print("The repeating elements are : ");    ...

Java Program to check two strings are Anagram or not

An anagram of a string is another string that contains same characters, only the order of characters can be different. For example, “LISTEN” and “SILENT” are anagram of each other. package com.caots.test; import java.util.Arrays; public class Test { public static void main(String[]...