InstanceOfJava

Java experience interview programming questions on Strings

Posted by: Instanceofjava Posted date: 6:03 PM / comment : 1 Concept and Interview Questions

1.Java Basic interview Programs on Strings

What is the output of following programs.
Click here for basic java interview questions on Strings

2.Reverse a String Without using String API?

Reverse a String Without using String API?

3.Sorting the String without using String API?

Sorting the String without using String API?

4.Check String is palindrome or not?

Check String is palindrome or not?

5.How to split a String in java

#1: Java Program to split a String using String Split() method:
#2: Java Program to split a String using String Split() method and use for each loop to display
#4: Java Program to split a String using String Split() method: Before splitting check whether deliminator is there or not
Check here for all questions on Splitting a string using string method

6.Removing Non Ascii character from a String?

#1: Java Program to Remove non ASCII chars from String
#2: Java Program to Remove multiple spaces in a string
Check here for all questions on removing non ascii char from a String

7.Java program to replace or remove a character in a string java

#1: Java Program to Remove all occurrences of char in a string
#2: Java Program to Replace First occurance of Specific index char in a String
#3: Java Program to Remove all Numbers from a string.
Check here for all questions on replacing or removing char from a String

8.Java Program to check two strings are anagrams or not

To check two strings are anagrams are not first we need to sort those two strings and compare
if both are equal then we can say two strings are anagrams
Check here for Java program to check two strings are anagrams or not

9.Java program to return maximum occurring character in the input string

Check here for the java program on max occurring char in a given string

10.Java program to count the number of vowels in a string.

Check here for all programs on counting number of vowels in a string

11.Java Program to find numbers of occurrences of given char in a string

Check here for possible solutions of finding number of occurrences of a char in a string

12.Java Program to count number of words in a String.

Check here for program on number of words in a string

13.How to reverse vowels in a string java

Reverse vowels of a string

14.Java program to remove vowels from string

Remove Vowels from string in java

15.How to find count of uppercase letters in a string

How to find uppercase letters in a string in java

Remove non ascii character from string

Posted by: Instanceofjava Posted date: 9:53 AM / comment : 0 Core java Interview Questions

#1: Java Program to Remove non ASCII chars from String

package com.instanceofjava;
class RemoveNonASCIIString{
public static void main(String [] args){
String str = "Instance��of��java";
System.out.println(str);
str = str.replaceAll("[^\\p{ASCII}]", "");
System.out.println("After removing non ASCII chars:");
System.out.println(str);
}
}

Output:

Instance��of��java
After removing non ASCII chars:
Instanceofjava

#2: Java Program to Remove multiple spaces in a string

package com.instanceofjava;
class RemoveNonASCIIString{
public static void main(String [] args){
String str = "Instance of java";
StringTokenizer st = new StringTokenizer(str, " ");
StringBuffer sb = new StringBuffer();
while(st.hasMoreElements()){
sb.append(st.nextElement()).append(" ");
}
System.out.println(sb.toString().trim());
}
}
}

Output:

Instance of java

How to split a string in java

Posted by: Instanceofjava Posted date: 1:10 AM / comment : 0 Core java Interview Questions

#1: Java Program to split a String using String Split() method:

package com.instanceofjava;
class SplitString{
public static void main(String [] args){
String str = "Instance-of-Java";
String strarray[]=str.split("-");
for (int i = 0; i < strarray.length; i++) {
System.out.println(strarray[i]);
}
}
}

Output:

Instance
of
Java

#2: Java Program to split a String using String Split() method and use for each loop to display

package com.instanceofjava;
class SplitString{
public static void main(String [] args){
String str = "Instance-of-Java";
String strarray[]=str.split("-");
for (String string : strarray) {
System.out.println(string);
}
}
}

Output:

Instance
of
Java

#3: Java Program to split a String using String Split() method: Before splitting check whether deliminator is there or not

package com.instanceofjava;
class SplitString{
public static void main(String [] args){
String str = "Instance-of-Java";
if(str.contains("-")){
String strarray[]=str.split("-");
for (String string : strarray) {
System.out.println(string);
}
}
else{
System.out.println("String does not conatain specified char so splitting is not possible");
}
}
}

Output:

Instance
of
Java

#4: Java Program to split a String using String Split() method: Before splitting check whether deliminator is there or not

package com.instanceofjava;
class SplitString{
public static void main(String [] args){
String str = "Instance-of-Java";
if(str.contains(".")){
String strarray[]=str.split("-");
for (String string : strarray) {
System.out.println(string);
}
}
else{
System.out.println("String does not contains specified char so splitting is not possible");
}
}
}

Output:

String does not contains specified char so splitting is not possible

Remove Character from string in java

Posted by: Instanceofjava Posted date: 12:50 AM / comment : 0 Core java Interview Questions

#1: Java Program to Remove all occurrences of a string

package com.instanceofjava;
class RemoveCharString{
public static void main(String [] args){
String str = "Java";
str = str.replace("a", "");
System.out.println(str);
}
}

Output:

#2: Java Program to Replace First occurance of Specific index char in a String

package com.instanceofjava;
class RemoveCharString{
public static void main(String [] args){
String str = "Java";
//String result = str.substring(0, index) + str.substring(index+1);
String result = str.substring(0, 1) + str.substring(1+1);
System.out.println(result);
}
}

Output:

#3: Java Program to Remove all Numbers from a string.

package com.instanceofjava;
class RemoveNumberString{
public static void main(String [] args){
String str = "Instance12ofjava143";
str = str.replaceAll("[0-9]","")
System.out.println(str);
}
}

Output:

Instanceofjava

Java Program to find Max occurred character in a string

Posted by: Instanceofjava Posted date: 3:44 PM / comment : 0 Core java Interview Questions

How to print duplicate characters from string in java?
Java program to count number of repeated characters in a string.
Java program for printing a repetitive letters in a string
count occurrences of each character in string java

package com.javatutorial;
public class MaxOccuranceOfChar{
public static String MaxOccuredChar(String str) {
char[] array = str.toCharArray();
int maxCount = 1;
char maxChar = array[0];
for(int i = 0, j = 0; i < str.length() - 1; i = j){
int count = 1;
while (++j < str.length() && array[i] == array[j]) {
count++;
}
if (count > maxCount) {
maxCount = count;
maxChar = array[i];
}
}
return (maxChar + " = " + maxCount);
}
public static void main(String[] args) {
String str1=MaxOccuredChar("instanceofjava");
System.out.println(str1);
String str2=MaxOccuredChar("aaaabbbccc");
System.out.println(str2);
String str3=MaxOccuredChar("ssssiiinnn");
System.out.println(str3);
String str4=MaxOccuredChar("jaaaavvvvvvvvaaaaaaaaaa");
System.out.println(str4);
}
}

Output:

i = 1
a = 4
s = 4
a = 10

Java program to check two strings are anagrams

Posted by: Instanceofjava Posted date: 3:27 PM / comment : 0 Core java Interview Questions

package com.javatutorial;
import java.util.Arrays;
public class CheckAnagramStrings {
private static boolean isAnagram(String str1, String str2) {
if (str1.length() != str2.length()) {
return false;
}
str1 = sortCharacters(str1);
str2 = sortCharacters(str2);
return str1.equals(str2);
}
private static String sortCharacters(String str) {
char[] charArray = str.toLowerCase().toCharArray();
Arrays.sort(charArray);
return String.valueOf(charArray);
}
public static void main(String[] args) {
String str1 = "bemru";
String str2 = "mureb";
if (isAnagram(str1, str2)) {
System.out.println(str2 + " is anagram of " + str1);
} else {
System.out.println("Strings are not anagrams.");
}
}
}

Output:

mureb is anagram of bemru

Subscribe to: Posts ( Atom )