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/* (Generate vehicle plate numbers) Assume a vehicle plate number consists of three uppercase letters followed by four digits. Write a program to generate a plate number. */ public class Exercise_04_25 { public static void main(String[] args) { // Generate three random uppercase letters int letter1 = 65 + (int)(Math.random() * (90 - 65)); int letter2 65 + (int)(Math.random() * (90 - 65)); int letter3 = 65 + (int)(Math.random() * (90 - 65)); // Generate four random digits int number1 = (int)(Math.random() 10); int number2 = (int)(Math.random() * 10); int number3 = (int)(Math.random() * 10); %3D int number4 = (int)(Math.random() * 10); // Display number plate System.out.println("" + (char)(letter1) + ((char)(letter2)) + ((char)(letter3)) + number1 + number2 + number3 + number4); } }

/* (Generate vehicle plate numbers) Assume a vehicle plate number consists of three uppercase letters followed by four digits. Write a program to generate a plate number. */ public class Exercise_04_25 { public static void main(String[] args) { // Generate three random uppercase letters int letter1 = 65 + (int)(Math.random() * (90 - 65)); int letter2 65 + (int)(Math.random() * (90 - 65)); int letter3 = 65 + (int)(Math.random() * (90 - 65)); // Generate four random digits int number1 = (int)(Math.random() 10); int number2 = (int)(Math.random() * 10); int number3 = (int)(Math.random() * 10); %3D int number4 = (int)(Math.random() * 10); // Display number plate System.out.println("" + (char)(letter1) + ((char)(letter2)) + ((char)(letter3)) + number1 + number2 + number3 + number4); } }

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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```java /* (Generate vehicle plate numbers) Assume a vehicle plate number consists of three uppercase letters followed by four digits. Write a program to generate a plate number. */ public class Exercise_04_25 { public static void main(String[] args) { // Generate three random uppercase letters int letter1 = 65 + (int)(Math.random() * (90 - 65)); int letter2 = 65 + (int)(Math.random() * (90 - 65)); int letter3 = 65 + (int)(Math.random() * (90 - 65)); // Generate four random digits int number1 = (int)(Math.random() * 10); int number2 = (int)(Math.random() * 10); int number3 = (int)(Math.random() * 10); int number4 = (int)(Math.random() * 10); // Display number plate System.out.println("" + (char)(letter1) + ((char)(letter2)) + ((char)(letter3)) + number1 + number2 + number3 + number4); } } ``` ### Explanation This Java program generates a random vehicle plate number. A typical plate number consists of three uppercase letters followed by four digits. #### Key Components: 1. **Random Uppercase Letters:** - Letters are generated using ASCII values. The ASCII value for 'A' is 65 and for 'Z' is 90. - The formula `65 + (int)(Math.random() * (90 - 65))` generates a random number between 65 and 90, which is then cast to a character to get corresponding uppercase letters. 2. **Random Digits:** - Digits are generated by multiplying `Math.random()`, which gives a number between 0 and 1, by 10 and casting it as an integer. This results in a number between 0 and 9. 3. **Displaying the Plate Number:** - The program concatenates the randomly generated characters and digits to form a complete plate number and prints it. This code is an excellent example of using basic Java functions for random number generation and character manipulation to solve a simple but practical problem.
Transcribed Image Text:```java /* (Generate vehicle plate numbers) Assume a vehicle plate number consists of three uppercase letters followed by four digits. Write a program to generate a plate number. */ public class Exercise_04_25 { public static void main(String[] args) { // Generate three random uppercase letters int letter1 = 65 + (int)(Math.random() * (90 - 65)); int letter2 = 65 + (int)(Math.random() * (90 - 65)); int letter3 = 65 + (int)(Math.random() * (90 - 65)); // Generate four random digits int number1 = (int)(Math.random() * 10); int number2 = (int)(Math.random() * 10); int number3 = (int)(Math.random() * 10); int number4 = (int)(Math.random() * 10); // Display number plate System.out.println("" + (char)(letter1) + ((char)(letter2)) + ((char)(letter3)) + number1 + number2 + number3 + number4); } } ``` ### Explanation This Java program generates a random vehicle plate number. A typical plate number consists of three uppercase letters followed by four digits. #### Key Components: 1. **Random Uppercase Letters:** - Letters are generated using ASCII values. The ASCII value for 'A' is 65 and for 'Z' is 90. - The formula `65 + (int)(Math.random() * (90 - 65))` generates a random number between 65 and 90, which is then cast to a character to get corresponding uppercase letters. 2. **Random Digits:** - Digits are generated by multiplying `Math.random()`, which gives a number between 0 and 1, by 10 and casting it as an integer. This results in a number between 0 and 9. 3. **Displaying the Plate Number:** - The program concatenates the randomly generated characters and digits to form a complete plate number and prints it. This code is an excellent example of using basic Java functions for random number generation and character manipulation to solve a simple but practical problem.
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