For Hexadecimal, the 0x or 0X is to be placed in the beginning of a number. Note − Digits 10 to 15 are represented by a to f (A to F) in Hexadecimal Here are some of the examples of hexadecimal integer literal declared and initialized as int. int one = 0X123; int two = 0xABC; Example Live Demo public class Demo { public static void main(String []args) { int one = 0X123; int two = 0xABC; System.out.println("Hexadecimal: "+one); System.out.println("Hexadecimal: "+two); } } Output Hexadecimal: 291 Hexadecimal: 2748

The System.out.format is used in Java to format output. Here, let’s say the following is our long. long val = 787890; To format, we have considered the following that justifies the output. System.out.format("%d%n", val); System.out.format("%9d%n", val); System.out.format("%+9d%n", val); System.out.format("%08d%n", val); System.out.format("%, 9d%n", val); The following is the complete example that displays the difference in output as well. Example Live Demo import java.util.Locale; public class Demo { public static void main(String []args) { long val = 787890; System.out.format("%d%n", val); ... Read More

To compare two Java long arrays in Java, use Arrays.equals() method. Let’s say we have the following long arrays. long[] arr1 = new long[] { 767, 568, 555, 897, 678 }; long[] arr2 = new long[] { 456, 756, 555, 999, 678}; long[] arr3 = new long[] { 767, 568, 555, 897, 678 }; Now, we can compare the equality of these arrays using the equals() method. Arrays.equals(arr1, arr2); Arrays.equals(arr2, arr3); Arrays.equals(arr1, arr3); The following is the complete example. Example Live Demo import java.util.*; public class Demo { public ... Read More

To sort long array in Java, use the Arrays.sort() method. Let’s say the following is our long array. long[] arr = new long[] { 987, 76, 5646, 96, 8768, 8767 }; To sort the above long array is an easy task in Java. Use the following method. Arrays.sort(arr); After that, print the array and you can see that it is sorted. for (long l : arr) { System.out.println(l); } The following is the complete example. Example Live Demo import java.util.*; public class Demo { public static ... Read More

The intersection of the two arrays results in those elements that are contained in both of them. If an element is only in one of the arrays, it is not available in the intersection. An example of this is given as follows − Array 1 = 1 2 5 8 9 Array 2 = 2 4 5 9 Intersection = 2 5 9 A program that demonstrates the intersection of two sorted arrays in Java is given as follows. Example Live Demo public class Example { public static void main(String args[]) ... Read More

A palindrome is a sequence that is same both forwards and backwards. The binary representation of a number is checked for being a palindrome but no leading 0’s are considered. An example of this is given as follows − Number = 5 Binary representation = 101 The binary representation of 5 is a palindrome as it is the same both forwards and backwards. A program that demonstrates this is given as follows. Example Live Demo public class Example { public static void main(String argc[]) { long num ... Read More

To concatenate a String and some integer values, you need to use the + operator. Let’s say the following is the string. String str = "Demo Text"; Now, we will concatenate integer values. String res = str + 1 + 2 + 3 + 4 + 5; The following is the final example. Example Live Demo public class Demo { public static void main(String[] args) { String str = "Demo Text"; System.out.println("String = "+str); String res = str + 1 + 2 + 3 + 4 + 5; System.out.println(res); } } Output String = Demo Text Demo Text12345

The duplicate characters in a string are those that occur more than once. These characters can be found using a nested for loop. Problem Statement Given a Java program to find the duplicate character in a given string. Input String = Tutorialspoint Output Duplicate Characters in above string are: t o i In the above string, t o i are duplicate characters as it occurs more than once. Approach to find all duplicate characters in a string Below are the steps to find all duplicate characters in a string − ... Read More

The n-th character from a string can be removed using the substring() function. An example of this is given as follows − String = Happy The 3rd character is removed = Hapy A program that demonstrates this is given as follows − Example Live Demo public class Example { public static void main(String args[]) { String str = "Apple"; System.out.println("Original string: " + str ); System.out.println("String with 4th character removed: " + removeChar(str, 4)); ... Read More

For swapping characters of a string in Java we can use string builder which is mutable so we need not to take care of new object creation during swapping. In this we would create a method which swap characters of string based on location of swapping characters.This method will take location of swapping characters as its parameters.First store both characters need to be swapped and using set character method of string builder swap the targeted characters. Example Live Demo public class SwapCharacters { public static void main(String[] args) { ... Read More