In this challenge, you must read an integer, a double, and a String from stdin, then print the values according to the instructions in the Output Format section below. To make the problem a little easier, a portion of the code is provided for you in the editor.Note: We recommend completing Java Stdin and Stdout I before attempting this challenge.Input FormatThere are three lines of input:The first line contains an integer.The second line contains a double.The third line contains a String.Output FormatThere are three lines of output:On the first line, print String: followed by the unaltered String read from stdin.On the second line, print Double: followed by the unaltered double read from stdin.On the third line, print Int: followed by the unaltered integer read from stdin.To make the problem easier, a portion of the code is already provided in the editor.Note: If you use the nextLine() method immediately following the nextInt() method, recall that nextInt() reads integer tokens; because of this, the last newline character for that line of integer input is still queued in the input buffer and the next nextLine() will be reading the remainder of the integer line (which is empty).Sample Input423.1415Welcome to HackerRank's Java tutorials!Sample OutputString: Welcome to HackerRank's Java tutorials!Double: 3.1415Int: 42
Question
In this challenge, you must read an integer, a double, and a String from stdin, then print the values according to the instructions in the Output Format section below. To make the problem a little easier, a portion of the code is provided for you in the editor.Note: We recommend completing Java Stdin and Stdout I before attempting this challenge.Input FormatThere are three lines of input:The first line contains an integer.The second line contains a double.The third line contains a String.Output FormatThere are three lines of output:On the first line, print String: followed by the unaltered String read from stdin.On the second line, print Double: followed by the unaltered double read from stdin.On the third line, print Int: followed by the unaltered integer read from stdin.To make the problem easier, a portion of the code is already provided in the editor.Note: If you use the nextLine() method immediately following the nextInt() method, recall that nextInt() reads integer tokens; because of this, the last newline character for that line of integer input is still queued in the input buffer and the next nextLine() will be reading the remainder of the integer line (which is empty).Sample Input423.1415Welcome to HackerRank's Java tutorials!Sample OutputString: Welcome to HackerRank's Java tutorials!Double: 3.1415Int: 42
Solution
This problem is a simple input-output problem in Java. Here's how you can solve it:
Step 1: Import the Scanner class from the java.util package. This class is used to get input from the user.
import java.util.Scanner;
Step 2: In the main method, create an instance of the Scanner class.
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
}
Step 3: Use the nextInt() method of the Scanner class to read an integer from the user. Store this integer in a variable.
int i = scan.nextInt();
Step 4: Use the nextDouble() method of the Scanner class to read a double from the user. Store this double in a variable.
double d = scan.nextDouble();
Step 5: Use the nextLine() method twice to move the scanner past the current line and read the next line into a string.
scan.nextLine(); // this line is important to move scanner to the next line
String s = scan.nextLine();
Step 6: Print the string, double, and integer in the required format.
System.out.println("String: " + s);
System.out.println("Double: " + d);
System.out.println("Int: " + i);
Step 7: Close the scanner object to prevent memory leaks.
scan.close();
Here's the complete code:
import java.util.Scanner;
public class Solution {
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
int i = scan.nextInt();
double d = scan.nextDouble();
scan.nextLine(); // move scanner to the next line
String s = scan.nextLine();
System.out.println("String: " + s);
System.out.println("Double: " + d);
System.out.println("Int: " + i);
scan.close();
}
}
This code will read an integer, a double, and a string from the user and print them in the required format.
Similar Questions
Input FormatThere are three lines of input:The first line contains an integer.The second line contains a double.The third line contains a String.Output FormatThere are three lines of output:On the first line, print String: followed by the unaltered String read from stdin.On the second line, print Double: followed by the unaltered double read from stdin.On the third line, print Int: followed by the unaltered integer read from stdin.To make the problem easier, a portion of the code is already provided in the editor.Note: If you use the nextLine() method immediately following the nextInt() method, recall that nextInt() reads integer tokens; because of this, the last newline character for that line of integer input is still queued in the input buffer and the next nextLine() will be reading the remainder of the integer line (which is empty).Sample Input423.1415Welcome to HackerRank's Java tutorials!Sample OutputString: Welcome to HackerRank's Java tutorials!Double: 3.1415Int: 42
In this challenge, you must read integers from stdin and then print them to stdout. Each integer must be printed on a new line. To make the problem a little easier, a portion of the code is provided for you in the editor below.
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