Java: An Introduction to Problem Solving and Programming (7th Edition)
7th Edition
ISBN: 9780133766264
Author: Walter Savitch
Publisher: PEARSON
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Expert Solution & Answer
Chapter 9.3, Problem 27STQ
Explanation of Solution
Given program segment:
//Try block
try
{
//Assign a value to the variable
int n = 7;
//Checking if value is greater than 0
if(n > 0)
//Throwing a predefined exception
throw new Exception();
//Checking if n is lesser than 0
else if (n < 0)
//Throwing user-defined exception
throw new NegativeNumberException();
//Else
else
//Print Hello
System.out.println("Hello!");
}
//Catch the user-defined exception
catch (NegativeNumberException e)
{
//Print the message
System...
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Students have asked these similar questions
What is the difference between using @Test(expected = TypeOfException) and using try/catch when testing if a method or constructor properly returns an exception?
A. They do the same thing.
B. @Test(expected = ...) is the proper way to unit test in java, and try/catch should only be used when unit testing in Python.
C. @Test(expected = ...) will give a passing test as soon as one exception of the proper type is thrown and then stop the test, but using try/catch will allow you to test many examples in the same test and will only stop after running all examples or reaching a fail() or an assert statement that fails.
D. We should never use try/catch when unit testing, otherwise we will catch the exception and then won't know if it is actually thrown.
*This is a handout from my class that I'm having trouble with I tried YouTube videos and I'm still lost please explain the answers as simply as you can and thank you.*
A. Look over the following code fragment, give the output:
try {
method();
System.out.println("After the method call");
}
catch (Exception ex) {
System.out.println("Exception in main");
}
catch (RuntimeException ex) {
System.out.println("RuntimeException in main");
}
static void method() throws Exception {
System.out.println(1 / 0);
}
B. Write the code to load an array. Use simple I/O (system.out.print, etc.) to get integer values from the user and load the array (loop?). Your code has the potential to generate 2 exceptions: 1) InputMismatch (research this) and 2) IllegalValueException (assume this exists). If the 1st occurs, change the input to be 99, warn the user and continue. The 2nd exception will occur when the user enters a 0; if this occurs, notify the user that a 0 has been entered, and change the input to…
Let's revisit chapter 5 example, but this time, no method can throw any exception out of the method and if an exception was detected then you will have to throw your own custom exception to let the user know what happened.
public class Chapter11Demo{ public static void main(java.lang.String[] args) {method1();}private static void method1(){ method2();}private static void method2(){ method3();}private static void method3(){ method4();}private static void method4(){ method5();}private static void method5(){ method6();}private static void method6(){ java.io.File in=new java.io.File("somefile.txt"); java.io.File out=new java.io.File("somefile2.txt"); java.util.Scanner inFile=new java.util.Scanner(in); java.io.FileWriter outFile=new java.io.FileWriter(out); }}
Chapter 9 Solutions
Java: An Introduction to Problem Solving and Programming (7th Edition)
Ch. 9.1 - Prob. 1STQCh. 9.1 - What output would the code in the previous...Ch. 9.1 - Prob. 3STQCh. 9.1 - Prob. 4STQCh. 9.1 - Prob. 5STQCh. 9.1 - Prob. 6STQCh. 9.1 - Prob. 7STQCh. 9.1 - Prob. 8STQCh. 9.1 - In the code given in Self-Test Question 1,...Ch. 9.1 - In the code given in Self-Test Question 1,...
Ch. 9.1 - Prob. 11STQCh. 9.1 - Prob. 12STQCh. 9.1 - Prob. 13STQCh. 9.1 - Prob. 14STQCh. 9.2 - Prob. 15STQCh. 9.2 - Prob. 16STQCh. 9.2 - Prob. 17STQCh. 9.2 - Prob. 18STQCh. 9.2 - Prob. 19STQCh. 9.2 - Prob. 20STQCh. 9.2 - Suppose that, in Self-Test Question 19, we change...Ch. 9.2 - Prob. 22STQCh. 9.2 - Prob. 23STQCh. 9.3 - Prob. 24STQCh. 9.3 - Prob. 25STQCh. 9.3 - Prob. 26STQCh. 9.3 - Prob. 27STQCh. 9.3 - Prob. 28STQCh. 9.3 - Repeat Self-Test Question 27, but change the value...Ch. 9.3 - Prob. 30STQCh. 9.3 - Prob. 31STQCh. 9.3 - Prob. 32STQCh. 9.3 - Consider the following program: a. What output...Ch. 9.3 - Write an accessor method called getPrecision that...Ch. 9.3 - Prob. 35STQCh. 9.4 - Rewrite the class ColorDemo in Listing 9.13 so...Ch. 9.4 - Prob. 37STQCh. 9 - Write a program that allows students to schedule...Ch. 9 - Prob. 2ECh. 9 - Prob. 3ECh. 9 - Prob. 4ECh. 9 - Prob. 5ECh. 9 - Write code that reads a string from the keyboard...Ch. 9 - Create a class Rational that represents a rational...Ch. 9 - Prob. 9ECh. 9 - Suppose that you are going to create an object...Ch. 9 - Revise the class RoomCounter described in the...Ch. 9 - Prob. 12ECh. 9 - Write a class LapTimer that can be used to time...Ch. 9 - Prob. 1PCh. 9 - Prob. 2PCh. 9 - Prob. 3PCh. 9 - Write a program that uses the class calculator in...Ch. 9 - Prob. 3PPCh. 9 - Prob. 7PPCh. 9 - Prob. 9PPCh. 9 - Suppose that you are in change of customer service...Ch. 9 - Write an application that implements a trip-time...
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