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Articles by AmitDiwan
Page 518 of 839
C# Object.GetType() Method with Examples
The Object.GetTypeCode() method in C# is used to get the Type of the current instance.SyntaxThe syntax is as follows −public Type GetType ();Example Live Demousing System; public class Demo { public static void Main() { Object ob = new Object(); String str = "Jim"; Type type1 = ob.GetType(); Type type2 = str.GetType(); Console.WriteLine("Type = "+type1); Console.WriteLine("Type = "+type2); Console.WriteLine("Hash Code = "+type1.GetHashCode()); Console.WriteLine("Hash Code = "+type2.GetHashCode()); } }OutputType = System.Object Type = System.String Hash Code = 30015890 Hash Code = 21083178Example Live Demousing System; ...
Read MoreWays to read input from console in Java
Let us see some ways to read input from console in Java −Exampleimport java.util.Scanner; public class Demo{ public static void main(String args[]){ Scanner my_scan = new Scanner(System.in); String my_str = my_scan.nextLine(); System.out.println("The string is "+my_str); int my_val = my_scan.nextInt(); System.out.println("The integer is "+my_val); float my_float = my_scan.nextFloat(); System.out.println("The float value is "+my_float); } }OutputThe string is Joe The integer is 56 The float value is 78.99A class named Demo contains the main function. An instance of the ...
Read MoreUsing Variables in JShell of Java 9
In JShell 9, variables can be declared during a session. Once the user has logged into the session, they can declare a variable as follows −jshell> int val = 56 ;Italics indicate the terminal, once the user has logged in to their session.The above line would print the below output. The semicolon in the above line is optional, and it will run fine without the semicolon also.Outputval = = > 56When an integer value is defined by assigning it to a variable name on the JShell, and it is executed, by pressing ‘Enter’ key, it is displayed on the next ...
Read MoreUsing underscore in Numeric Literals in Java
Followig is the code showing how to use underscore in numeric literals in Java −Example Live Demopublic 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 MoreUsing predefined class name as Class or Variable name in Java
Using a predefined class name as a class nameLet us see an example −Example Live Demopublic 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 −Example Live Demopublic class String{ public static void main (java.lang.String[] args){ System.out.println("Pre-defined class name ...
Read MoreUsing TreeMap to sort User-defined Objects in Java
To sort user-defined object in Java, the code is as follows −Example Live Demoimport 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 MoreUnreachable Code Error in Java
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 −Example Live Demopublic 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. "); } } } ...
Read MoreHow to combine duplicate values into one with corresponding value separated by hyphens in MySQL?
To combine, use GROUP_CONCAT() function to combine some attributes in two rows into one. As a separator, use hyphens.Let us first create a table −mysql> create table DemoTable1386 -> ( -> Title varchar(255), -> Name varchar(60) -> ); Query OK, 0 rows affected (0.67 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1386 values('Introduction to MySQL', 'Paul DuBois'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable1386 values('Java in Depth', 'Khalid Mughal'); Query OK, 1 row affected (0.48 sec) mysql> insert into DemoTable1386 values('Introduction to MySQL', 'Russell Dyer'); Query OK, ...
Read MoreJava Program to Find the closest pair from two sorted arrays
To find the closest pair from two sorted array, the Java code is as follows −Example Live Demopublic 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; ...
Read MoreImplement numbering in MySQL GROUP_CONCAT
Let us first create a table −mysql> create table DemoTable1627 -> ( -> FirstName varchar(20), -> LastName varchar(20) -> ); Query OK, 0 rows affected (0.59 sec)Insert some records in the table using insert command.mysql> insert into DemoTable1627 values('John', 'Smith'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable1627 values('John', 'Doe'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable1627 values('Adam', 'Smith'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable1627 values('Carol', 'Taylor'); Query OK, 1 row affected (0.08 sec)Display all records from the table using ...
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