AP Computer Science A › Identifying Boundary Cases
Identify a user error that could occur in this program
UserInput ui = new UserInput(); // input from the user
int s = (Integer)ui;
System.out.println(s);
The user input could not be an integer
There is nothing wrong
The parseInt statement is incorrect
The user can never do anything wrong
The user could input a string and the cast to an (Integer) would cause a runtime exception. If there is a runtime exception, the program will stop and open up vulnerabilities to hackers. Once a hacker knows how to halt a program, they can start input bad data to see a database schema to collect data. One way to fix this would be using a utility method such as parseInt(ui).
Identify a user error that could occur in this program
UserInput ui = new UserInput(); // input from the user
int s = (Integer)ui;
System.out.println(s);
The user input could not be an integer
There is nothing wrong
The parseInt statement is incorrect
The user can never do anything wrong
The user could input a string and the cast to an (Integer) would cause a runtime exception. If there is a runtime exception, the program will stop and open up vulnerabilities to hackers. Once a hacker knows how to halt a program, they can start input bad data to see a database schema to collect data. One way to fix this would be using a utility method such as parseInt(ui).
Identify a user error that could occur in this program
UserInput ui = new UserInput(); // input from the user
int s = (Integer)ui;
System.out.println(s);
The user input could not be an integer
There is nothing wrong
The parseInt statement is incorrect
The user can never do anything wrong
The user could input a string and the cast to an (Integer) would cause a runtime exception. If there is a runtime exception, the program will stop and open up vulnerabilities to hackers. Once a hacker knows how to halt a program, they can start input bad data to see a database schema to collect data. One way to fix this would be using a utility method such as parseInt(ui).