Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Question

Write a JAVA program that reads a number between 1,000 and 999,999 from the user, where the user enters a comma in the input. Then print the number without a comma. Here is a sample dialog:

Please enter an integer between 1,000 and 999,999:      24,562

24562

Hint: Read the input as a string. Measure the length of the string. Suppose it contains n characters. Then extract the substring consisting of the first n-4 characters and the last three characters

Expert Solution
Check Mark
Step 1

Approach

Here we will first read the input as a string with comma and then we will print out subtring consisting of first n-4 characters (index 0 to length-5) and the last three characters (index length-3 to length-1).

 

Syntax: string.substring(int startingIndex, int lastIndex);

Here lastIndex is exclusive of the sustring.

 

 

Code

import java.util.*;

public class Main
{
 public static void main(String[] args) {
  Scanner sc= new Scanner(System.in);
        System.out.print("Please enter an integer between 1,000 and 999,999: ");
        String str= sc.nextLine();
        int len = str.length();
        
        if(len<5 || len >7 || str.charAt(len-4)!=','){
            System.out.println("Input number entered is not correct");
        }
        
        System.out.println(str.substring(0,len-4)+str.substring(len-3,len));
 }
}

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