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To count the characters in each word in a given sentence, the Java code is as follows −Exampleimport java.util.*; public class Demo{ static final int max_chars = 256; static void char_occurence(String my_str){ int count[] = new int[max_chars]; int str_len = my_str.length(); for (int i = 0; i < str_len; i++) count[my_str.charAt(i)]++; char ch[] = new char[my_str.length()]; for (int i = 0; i < str_len; i++){ ch[i] = my_str.charAt(i); int find = 0; for (int j = 0; j
To count trailing zeroes in factorial of a number, the Java code is as follows −Exampleimport java.io.*; public class Demo{ static int trailing_zero(int num){ int count = 0; for (int i = 5; num / i >= 1; i *= 5){ count += num / i; } return count; } public static void main (String[] args){ int num = 1000000; System.out.println("The number of trailing zeroes in " + num +" factorial is " + ... Read More
To expand a String if range is given, the Java code is as follows −Examplepublic class Demo { public static void expand_range(String word) { StringBuilder my_sb = new StringBuilder(); String[] str_arr = word.split(", "); for (int i = 0; i < str_arr.length; i++){ String[] split_str = str_arr[i].split("-"); if (split_str.length == 2){ int low = Integer.parseInt(split_str[0]); int high = Integer.parseInt(split_str[split_str.length - 1]); while (low
To find reminder of array multiplication divided by n, the Java code is as follows −Exampleimport java.util.*; import java.lang.*; public class Demo{ public static int remainder(int my_arr[], int arr_len, int val){ int mul_val = 1; for (int i = 0; i < arr_len; i++) mul_val = (mul_val * (my_arr[i] % val)) % val; return mul_val % val; } public static void main(String argc[]){ int[] my_arr = new int []{ 35, 100, 69, 99, 27, 88, 12, 25 }; ... Read More
To find the closest pair from two sorted array, the Java code is as follows −Examplepublic class Demo { void closest_pair(int my_arr_1[], int my_arr_2[], int arr_1_len, int arr_2_len, int sum){ int diff = Integer.MAX_VALUE; int result_l = 0, result_r = 0; int l = 0, r = arr_2_len-1; while (l=0){ if (Math.abs(my_arr_1[l] + my_arr_2[r] - sum) < diff){ result_l = l; result_r = r; diff ... Read More
Unreachable code error occurs when the code can’t be compiled due to a variety of reasons, some of which include: infinite loop, return statement before the unreachable line of code.Let us see an example −Examplepublic class Demo{ public static void main(String args[]){ int val = 5; for (;;){ if (val == 5){ break; System.out.println("If the condition is not true, this line would be printed. "); } } } }Output/Demo.java:11: ... Read More
To sort user-defined object in Java, the code is as follows −Exampleimport java.io.*; import java.util.*; public class Demo{ static void sort_objects(String my_data){ String[] my_vals = my_data.split(" "); Map my_map = new TreeMap(); for (int i = 1; i < my_vals.length; i += 2){ int my_age = Integer.parseInt(my_vals[i]); String name = my_vals[i - 1]; if (my_map.containsKey(my_age)){ ArrayList my_list = my_map.get(my_age); my_list.add(name); ... Read More
Using a predefined class name as a class nameLet us see an example −Examplepublic class Number{ public static void main (String[] args){ System.out.println("Pre-defined class name can be used as a class name"); } }OutputPre-defined class name can be used as a class nameThe class Number has a main function that displays a message when it is executed. The main function takes string values as arguments.Using a predefined class name as a variable nameLet us see an example −Examplepublic class String{ public static void main (java.lang.String[] args){ System.out.println("Pre-defined class name can be ... Read More
Here we will see the threaded binary tree data structure. We know that the binary tree nodes may have at most two children. But if they have only one children, or no children, the link part in the linked list representation remains null. Using threaded binary tree representation, we can reuse that empty links by making some threads.If one node has some vacant left or right child area, that will be used as thread. There are two types of threaded binary tree. The single threaded tree or fully threaded binary tree.For fully threaded binary tree, each node has five fields. ... Read More
Followig is the code showing how to use underscore in numeric literals in Java −Examplepublic class Demo{ public static void main (String[] args) throws java.lang.Exception{ int my_num_1 = 6_78_00_120; System.out.println("The number is : " + my_num_1); long my_num_2 = 2_00_11_001; System.out.println("The number is : " + my_num_2); float my_num_3 = 4.01_981F; System.out.println("The number is : " + my_num_3); double my_num_4 = 12.89_46_061; System.out.println("The number is : " + my_num_4); } }OutputThe number is : ... Read More