Programming Solutions

Write a java program to check that string is possible to make palindrome or not......... import java.util.Scanner; public class PossiblePalindrome { public static void main(String[] args) { Scanner sc=new Scanner(System.in); System.out.println("Enter a String : "); String str=sc.nextLine(); char[] arr=str.toCharArray(); int[] index=indexNumber(arr); boolean res=possPalin(index); if(res) { System.out.println("yes it is possible to make palindrome"); } else { System.out.println("no it is not possible to make palindrome "); } } static int[] indexNumber(char[] arr) { int index[]=new int[26]; for(int i=0;i<arr.length;i++) { char ch=arr[i]; if(ch>64 && ch<91) { index[ch-65]++; } else if(ch>=97 && ch<=122) { index[ch-97]++; } } return index; } static boolean possPalin(int arr[]) { int count=0; fo...

Write a java program to Replace a word in String : package String; import java.util.Scanner; public class ReplaceString { public static void main(String[] args) { Scanner in=new Scanner(System.in); String str="Hello <<UserName>>, How are you?"; String uname=null; do { System.out.println("Enter user name :"); uname=in.nextLine(); if(uname.length()>3 && uname.length()<11) break; else { System.out.println("Invalid user please ReEnter : "); continue; } }while(uname.length()<3 || uname.length()>10); System.out.println(uname); str=str.replaceAll("<<UserName>>", uname); System.out.println(str); } }

Write a java program to calculate product of each column in matrix :  import java.util.Random; import java.util.Scanner; public class ColumnWiseProduct { public static void main(String[] args) { ColumnWiseProduct cwp=new ColumnWiseProduct(); int arr[][]=cwp.readmatrix(); cwp.dispMat(arr); int prod[]=cwp.prodColWise(arr); System.out.println("Entered matrix Column wise product is :"); cwp.dispSingleArray(prod); } int[] prodColWise(int mat[][]){ int prod[]=new int[mat[0].length]; for(int i=0;i<mat[0].length;i++) { prod[i]=1; for(int j=0;j<mat.length;j++) { prod[i]=prod[i]*mat[j][i]; } } return prod; } int[][] readmatrix(){ Scanner sc=new Scanner(System.in); System.out.println("Enter Row size and column size :"); int row=sc.nextInt(); int col=sc.nextInt(); int mat[][]=new int[row][col]; System.out.println("Enter Elements in Table : "); for(int i=0;i<row;i++) { for(int...

Write a java program to calculate sum column wise in a matrix: import java.util.Random; import java.util.Scanner; public class ColumnWiseLeast { public static void main(String[] args) { int mat[][]=readmatrix(); dispMat(mat); System.out.println("Sum of Diagonal element is : "); int arr[]=leastColWise(mat); dispSingleArray(arr); } static int[] leastColWise(int mat[][]) { int least[]=new int[mat[0].length]; for(int i=0;i<mat[0].length;i++) { least[i]=mat[0][i]; for(int j=0;j<mat.length;j++) { if(least[i]>mat[j][i]) { least[i]=mat[j][i]; } } }return least; } static int[][] readmatrix(){ Random rx=new Random(); Scanner sc=new Scanner(System.in); System.out.println("Enter Row size and column size :"); int row=sc.nextInt(); int col=sc.nextInt(); int mat[][]=new int[row][col]; System.out.println("Enter Elements in Table : "); for(int i=0;i<row;i++) { fo...

Write a java program to sum of Diagonal elements in matrix: import java.util.Random; import java.util.Scanner; public class SumOfDiagonalElements { public static void main(String[] args) { int arr[][]=readmatrix(); dispMat(arr); int sum[]=sumOfDiagonal(arr); System.out.println("primary Diagonal element sum is : "+sum[0]); System.out.println("Secondary Diagonal element sum is :"+sum[1]); } static int[] sumOfDiagonal(int mat[][]) { int []sum=new int[2]; int n=mat.length; for(int i=0;i<n;i++) { for(int j=0;j<n;j++) { if(i==j) { sum[0]=sum[0]+mat[i][j]; } if(i+j==n-1) { sum[1]=sum[1]+mat[i][j]; } } } return sum; } static int[][] readmatrix(){ Random rx=new Random(); Scanner sc=new Scanner(System.in); System.out.println("Enter Row size and column size :"); int row=sc.nextInt(); int col=sc.nextInt(); int mat[][]=new int[row]...

Write a java program to Rotate matrix 90 degree left and rotate 90 degree right :  import java.util.Random; import java.util.Scanner; public class RotateMatrix { public static void main(String[] args) { System.out.println("Enter matrix : "); int arr[][]=readmatrix(); System.out.println("Matrix is : "); dispMat(arr); int arr2[][]=rotate90Left(arr); System.out.println("90 Degree left rotate matrix is :"); dispMat(arr2); System.out.println("90 degree right rotate Matrix is :"); arr=rotate90Right(arr); dispMat(arr); } static int[][] rotate90Left(int mat[][]){ ColumnWiseReverse cw=new ColumnWiseReverse(); mat=transposeMat(mat); cw.colWiseReverse(mat); return mat; } static int[][] rotate90Right(int mat[][]){ RowWiseReverse rw=new RowWiseReverse(); mat=transposeMat(mat); rw.rowWiseReverse(mat); return mat; } static int[][] transposeMat(int m[][])...

Write a java program to count negative number in a matrix : import java.util.Scanner; public class CountNegValue { public static void main(String[] args) { int a[][]=readmatrix(); dispMat(a); int count=countNeg(a); System.out.println("Entered negative number is : "+count); } static int[][] readmatrix(){ Scanner sc=new Scanner(System.in); System.out.println("Enter Row size and column size :"); int row=sc.nextInt(); int col=sc.nextInt(); int mat[][]=new int[row][col]; System.out.println("Enter Elements in Table : "); for(int i=0;i<row;i++) { for(int j=0;j<col;j++) { mat[i][j]=sc.nextInt(); } }return mat; } static void dispMat(int mat[][]) {   for(int i=0;i<mat.length;i++) { for(int j=0;j<mat[i].length;j++) { System.out.print(mat[i][j]+" "); }System.out.println(); }   } static int countNeg(int mat[][]) { int count=0; ...

Write a java program to calculate sum of each element of matrix using Random input :  import java.util.Random; import java.util.Scanner; public class SumOfMatrixElement { static Random rx=new Random(); public static void main(String[] args) { System.out.println("Enter a matrix : "); int [][]mat=readmatrix(); dispMat(mat); int sum=sumOfMatrix(mat); System.out.println("Sum of matrix is : "+sum); } static int[][] readmatrix(){ Scanner sc=new Scanner(System.in); System.out.println("Enter Row size and column size :"); int row=sc.nextInt(); int col=sc.nextInt(); int mat[][]=new int[row][col]; System.out.println("Enter Elements in Table : "); for(int i=0;i<row;i++) { for(int j=0;j<col;j++) { mat[i][j]=rx.nextInt(50); } }return mat; } static void dispMat(int mat[][]) {   for(int i=0;i<mat.length;i++) { for(int j=0;j<mat[i].le...

Write a java program to find biggest element from matrix using random input :  import java.util.Random; import java.util.Scanner; public class BiggestElementMatrix { static Random rx=new Random(); public static void main(String[] args) { System.out.println("Enter a matrix : "); int [][]mat=readmatrix(); int big=biggestMatrix(mat); System.out.println("Matrix is "); dispMat(mat); System.out.println("Biggest element is : "+big); } static int[][] readmatrix(){ Scanner sc=new Scanner(System.in); System.out.println("Enter Row size and column size :"); int row=sc.nextInt(); int col=sc.nextInt(); int mat[][]=new int[row][col]; System.out.println("Enter Elements in Table : "); for(int i=0;i<row;i++) { for(int j=0;j<col;j++) { mat[i][j]=rx.nextInt(50); } }return mat; } static int biggestMatrix(int[][] mat) { int temp=0; for(i...

Write a java program to add two matrices :  import java.util.Scanner; public class AddTwoMatrix { public static void main(String[] args) { System.out.println("Enter Read first matrix : "); int[][] a=readmatrix(); System.out.println("Enter second matrix : "); int b[][]=readmatrix(); int res[][]=addMat(a, b); System.out.println("First matrix is : "); dispMat(a); System.out.println("Second matrix is : "); dispMat(b); System.out.println("Result matrix is : "); dispMat(res); }  static int[][] readmatrix(){ Scanner sc=new Scanner(System.in); System.out.println("Enter Row size and column size :"); int row=sc.nextInt(); int col=sc.nextInt(); int mat[][]=new int[row][col]; System.out.println("Enter Elements in Table : "); for(int i=0;i<row;i++) { for(int j=0;j<col;j++) { mat[i][j]=sc.nextInt(); } }return mat; ...

Write a java program to print following pattern: import java.util.Scanner; public class DiamondInsideSqure { public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.println("Enter Row size :"); int n = sc.nextInt(); int states = n, space = 0; for (int i = 0; i < 2 * n-1; i++) { if(i==0) { states=states; space=space; } else if (i <n) { states = states - 1; space = space + 2; } else { states = states + 1; space = space - 2; } for (int j = 0; j < states; j++) { System.out.print("*"); } for (int k = 0; k < space; k++) { System.out.print(" "); } for (int j = 0; j < states; j++) { System.out.print("*"); } System.out.println(); } } }

Write a java program to calculate each word length in sentence : import java.util.Scanner; public class CountCharInEachWord { public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.println("Enter Sentence "); String str = sc.nextLine(); charLength(str); } static void charLength(String str) { for(int i=0;i<str.length();i++) { int k=i; String temp=""; while(i<str.length() && str.charAt(i)!=' ' ) { temp=temp+str.charAt(i); i++; } System.out.println(temp+" Length is "+(i-k)); } } }

Write a java program to change all vowels in Capital and other in small : import java.util.Scanner; public class VowelsIntoCap { public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.println("Enter Sentence "); String str = sc.nextLine(); str = vowelsCap(str); System.out.println("After changing vowels in capital \n" + str); } private static String vowelsCap(String str) { char[] ch = str.toCharArray(); for (int i = 0; i < ch.length; i++) { if (ch[i] == 'a' || ch[i] == 'e' || ch[i] == 'i' || ch[i] == 'o' || ch[i] == 'u') { ch[i] = (char) (ch[i] - 32); } else if (ch[i] >= 'A' && ch[i] <= 'Z') { if ((ch[i] == 'A' || ch[i] == 'E' || ch[i] == 'I' || ch[i] == 'O' || ch[i] == 'U')) ch[i] = (char) (ch[i]); else { ch[i] = (char) (ch[i] + 32); } } else { ...

Write a java program to change first char of every word in initCap :  import java.util.Scanner; public class ConvertWordInitCap { public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.println("Enter Sentence "); String str = sc.nextLine(); System.out.println("Before init Caps"); System.out.println(str); str = intitCaps(str); System.out.println("After init Cap "); System.out.println(str); } private static String intitCaps(String str) { char ch[] = str.toCharArray(); for (int i = 0; i < ch.length; i++) { if (i == 0 && ch[i] != ' ' || (ch[i] != ' ' && ch[i - 1] == ' ')) { if (ch[i] >= 'a' && ch[i] <= 'z') { ch[i] = (char) (ch[i] - 32); } } else { if (ch[i] >= 'A' && ch[i] <= 'Z') { ch[i] = (char) (ch[i] + 32); } ...

Write a java program to count words in a string :  import java.util.Scanner; public class CountWord { public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.println("Enter Sentence "); String str = sc.nextLine(); int c=countWord(str); System.out.println(c); } private static int countWord(String str) { char ch[] = str.toCharArray(); int count=0; for (int i = 0; i < ch.length; i++) { if((i==0 && ch[i]!=' ' )|| (ch[i]!=' ' && ch[i-1]==' ')) { count++; } } return count; } }

Write a java program to change First char in small and other in capital :  import java.util.Scanner; public class FirstCharIntoSmall { public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.println("Enter Sentence "); String str = sc.nextLine(); System.out.println("Before small caps \n"+str); System.out.println("After changing String "); str=initSmall(str); System.out.println(str); } private static String initSmall(String str) { char ch[] = str.toCharArray(); for (int i = 0; i < ch.length; i++) { if (i == 0 && ch[i] != ' ' || (ch[i] != ' ' && ch[i - 1] == ' ')) { if (ch[i] >= 'A' && ch[i] <= 'Z') { ch[i] = (char) (ch[i] + 32); } } else { if (ch[i] >= 'a' && ch[i] <= 'z') { ch[i] = (char) (ch[i] - 32); } } ...

Write a java program to match with word: import java.util.Scanner; public class CheckSpecifiedWord { public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.println("Enter Sentence "); String str = sc.nextLine(); System.out.println("Enter Substring : "); String substr=sc.nextLine(); boolean rs=isMatchWord(str, substr); if(rs) { System.out.println("Matched"); } else { System.out.println("unmatched"); } } static boolean isMatchWord(String str,String substr) { int j=0; for(int i=0;i<str.length();i++) { String temp=""; while(i<str.length() && str.charAt(i)!=' ') { temp=temp+str.charAt(i); i++; } System.out.println(temp); System.out.println(substr); if(temp.equals(substr)) return true; } return false; } }

Write a java program to count how many times substring is present in Sentence :  import java.util.Scanner; public class CountSubString { public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.println("Enter Sentence "); String str = sc.nextLine(); System.out.println("Enter Substring : "); String substr=sc.nextLine(); int count=toCountSubstring(str,substr); System.out.println("Entered Substring is present "+count+" times"); } private static int toCountSubstring(String str, String substr) { char []string =str.toCharArray(); char []subst=substr.toCharArray(); int count=0; for(int i=0;i<string.length;i++) { int j=0,k=i; while(k<string.length && j<subst.length && (string[k]==subst[j])) { k++; j++; } if(j==subst.length) { count++; } } return count; } }

Write a java program to check two string is Anagram or not :  import java.util.Scanner; class Anagram { public static void main(String[] args) { Scanner sc=new Scanner(System.in); System.out.println("Enter first Sentence "); String st=sc.nextLine(); int[] string1=indexNumber(st); System.out.println("Enter Second Sentence "); String st2=sc.nextLine(); int[] string2=indexNumber(st2); CompareTwoArray ct=new CompareTwoArray(); boolean rs=ct.isAnagram(string1, string2); if(rs) { System.out.println("String is anagram "); } else { System.out.println("Not a anagram"); } } static int[] indexNumber(String str) { int count[]=new int[26]; for(int i=0;i<str.length();i++) { char ch=str.charAt(i); if(ch>=65 && ch<=90) { count[ch-65]++; } else if(ch>=97 && ch<=122) { count[ch-97]++; } } return count; } } ...

Write a java program to check string is Panagram or not ?  import java.util.Scanner; public class PanagramString { public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.println("Enter a String : "); String str = sc.nextLine(); if (str.length() < 26) { System.out.println("Entered String is not Panagram "); } else { boolean re = isPanagram(str); if (re) { System.out.println("Entered string is panagram "); } else System.out.println("Not a panagram string"); } } static boolean isPanagram(String str) { int count[] = new int[26]; for (int i = 0; i < str.length(); i++) { char ch = str.charAt(i); if (ch >= 65 && ch <= 90) { count[ch - 65]++; } else if (ch >= 97 && ch <= 122) { count[ch - 97]++; } } for (int i = 0; i < count.length; i++) { if (count[i] == 0)...