Unit 2a Write Code for Toggle Code

Activity 12.11.1.

Write code that tests guess to see if it is equal to answer or too high or too low. If it is too high as in the example below, it should print out Your guess is too high.

🔗

public class Test1
{
    public static void main(String[] args)
    {
        int guess = 10;
        int answer = 5;

// Add your code here

}
}
====
import static org.junit.Assert.*;

import org.junit.*;

import java.io.*;

public class RunestoneTests extends CodeTestHelper
{
    public RunestoneTests()
    {
        super("Test1");
    }

@Test
    public void test1()
    {
        String output = getMethodOutput("main");
        String expect = "Your guess is too high";

boolean passed = getResults(expect, output, "Running main");
        assertTrue(passed);
    }

@Test
    public void test2()
    {
        String code = getCodeWithoutComments();
        int count = countOccurences(code, "if");
        boolean passed = getResults("" + 2, "" + count, "Counting number of ifs");
        assertTrue(passed);
    }

@Test
    public void test3()
    {
        String code = getCodeWithoutComments();
        int count = countOccurences(code, "else");
        boolean passed = getResults("" + 2, "" + count, "Counting number of elses");
        assertTrue(passed);
    }

@Test
    public void test4()
    {
        String code = getCodeWithoutComments();
        int count = countOccurences(code, "else if");
        boolean passed = getResults("" + 1, "" + count, "Counting number of else ifs");
        assertTrue(passed);
    }
}

🔗

Activity 12.11.2.

Write code that prints You can go out if you don’t have any homework and have cleaned and otherwise prints You can not go out.

🔗

public class Test1
{
    public static void main(String[] args)
    {
        boolean homeworkLeft = false;
        boolean cleaned = true;
        // Add your code here

}
}
====
// ch4ex2muc
import static org.junit.Assert.*;

import org.junit.*;

import java.io.*;

public class RunestoneTests extends CodeTestHelper
{
    public RunestoneTests()
    {
        super("Test1");
    }

@Test
    public void test1()
    {
        String output = getMethodOutput("main");
        String expect = "You can go out";

boolean passed = getResults(expect, output, "Running main");
        assertTrue(passed);
    }

@Test
    public void test2()
    {
        String code = getCodeWithoutComments();
        int count = countOccurences(code, "if");
        boolean passed = getResults("" + 1, "" + count, "Counting number of ifs");
        assertTrue(passed);
    }

@Test
    public void test3()
    {
        String code = getCodeWithoutComments();
        int count = countOccurences(code, "else");
        boolean passed = getResults("" + 1, "" + count, "Counting number of elses");
        assertTrue(passed);
    }
}

🔗

Activity 12.11.3.

Write code that tests if x is between 1 and 10, and prints 1 <= x <= 10 or x is not in range.

🔗

public class Test1
{
    public static void main(String[] args)
    {
        int x = 3;

// Add your code here

}
}
====
import static org.junit.Assert.*;

import org.junit.*;

import java.io.*;

public class RunestoneTests extends CodeTestHelper
{
    public RunestoneTests()
    {
        super("Test1");
    }

@Test
    public void test1()
    {
        String output = getMethodOutput("main");
        String expect = "1 <= x <= 10";

boolean passed = getResults(expect, output, "Running main");
        assertTrue(passed);
    }

@Test
    public void test2()
    {
        String code = getCodeWithoutComments();
        int count = countOccurences(code, "if");
        boolean passed = getResults("" + 1, "" + count, "Counting number of ifs");
        assertTrue(passed);
    }

@Test
    public void test3()
    {
        String code = getCodeWithoutComments();
        int count = countOccurences(code, "else");
        boolean passed = getResults("" + 1, "" + count, "Counting number of elses");
        assertTrue(passed);
    }

@Test
    public void test4()
    {
        boolean passed = checkCodeContains("x >= 1 && x <= 10");
        assertTrue(passed);
    }
}

🔗

Activity 12.11.4.

Write code that prints out if the string message has the word ringing in it or not. It should print out Answer the phone! if ringing is in message, and I don't hear anything. if not.

🔗

Activity 12.11.5.

Write code that prints if your favorite food is junk food (pizza or wings) or not. Your code should check to see if the variable favFood value is pizza or wings. If it is, it should print out Your fav is junk food. If not, it should print Your fav is not junk.

🔗

public class Test1
{
    public static void main(String[] args)
    {
        String favFood = "kale";
        // Add your code here

}
}
====
import static org.junit.Assert.*;

import org.junit.*;

import java.io.*;

public class RunestoneTests extends CodeTestHelper
{
    public RunestoneTests()
    {
        super("Test1");
    }

@Test
    public void test1()
    {
        String output = getMethodOutput("main");
        String expect = "Your fav is not junk";

boolean passed = getResults(expect, output, "Running main");
        assertTrue(passed);
    }

@Test
    public void test2()
    {
        String code = getCodeWithoutComments();
        int count = countOccurences(code, ".equals(");
        boolean passed = count >= 2;
        passed = getResults("" + 2, "" + count, "Counting number of calls to .equals()", passed);
        assertTrue(passed);
    }

@Test
    public void test3()
    {
        boolean passed = checkCodeContains("||");
        assertTrue(passed);
    }
}

🔗

Activity 12.11.6.

Write code that prints your fine if you are speeding. If you are going over 65 but less than 75, the fine is 50. If you are going at least 75 and less than 85, the fine is 100. Over that the fine is 200. It should not print anything if you are not speeding.

🔗

Activity 12.11.7.

Write code that prints the alarm time. If it is a weekday you should get up at 7:00am and if not get up at 10:00am.

🔗

public class Test1
{
    public static void main(String[] args)
    {
        boolean weekend = false;
        // Add your code here
    }
}
====
import static org.junit.Assert.*;

import org.junit.*;

import java.io.*;

public class RunestoneTests extends CodeTestHelper
{
    public RunestoneTests()
    {
        super("Test1");
    }

@Test
    public void test1()
    {
        String output = getMethodOutput("main");
        String expect = "7:00am";

boolean passed = getResults(expect, output, "Running main");
        assertTrue(passed);
    }

@Test
    public void test2()
    {
        boolean passed = checkCodeContains("!weekend");
        assertTrue(passed);
    }

@Test
    public void test3()
    {
        String code = getCodeWithoutComments();
        int count = countOccurences(code, "if");
        boolean passed = getResults("" + 1, "" + count, "Counting number of ifs");
        assertTrue(passed);
    }

@Test
    public void test4()
    {
        String code = getCodeWithoutComments();
        int count = countOccurences(code, "else");
        boolean passed = getResults("" + 1, "" + count, "Counting number of elses");
        assertTrue(passed);
    }
}

🔗

Activity 12.11.8.

Write code that prints if you Can text now or Can't text now. You can text if you are not driving and not eating.

🔗

public class Test1
{
    public static void main(String[] args)
    {
        boolean driving = true;
        boolean eating = false;
        // Add your code here
    }
}
====
import static org.junit.Assert.*;

import org.junit.*;

import java.io.*;

public class RunestoneTests extends CodeTestHelper
{
    public RunestoneTests()
    {
        super("Test1");
    }

@Test
    public void test1()
    {
        String output = getMethodOutput("main");
        String expect = "Can't text now";

boolean passed = getResults(expect, output, "Running main");
        assertTrue(passed);
    }

@Test
    public void test2()
    {
        boolean passed = checkCodeContains("!driving && !eating");
        assertTrue(passed);
    }

@Test
    public void test3()
    {
        String code = getCodeWithoutComments();
        int count = countOccurences(code, "if");
        boolean passed = getResults("" + 1, "" + count, "Counting number of ifs");
        assertTrue(passed);
    }

@Test
    public void test4()
    {
        String code = getCodeWithoutComments();
        int count = countOccurences(code, "else");
        boolean passed = getResults("" + 1, "" + count, "Counting number of elses");
        assertTrue(passed);
    }
}

🔗

Activity 12.11.9.

Write code that prints whether your name Starts with a vowel (a, e, i, o, u) or Starts with a consonant.

🔗

public class Test1
{
    public static void main(String[] args)
    {
        String name = "Julian";
        String firstLetter = name.substring(0, 1);
        String lowerFirst = firstLetter.toLowerCase();

// Add your code here
    }
}
====
import static org.junit.Assert.*;

import org.junit.*;

import java.io.*;

public class RunestoneTests extends CodeTestHelper
{
    public RunestoneTests()
    {
        super("Test1");
    }

@Test
    public void test1()
    {
        String output = getMethodOutput("main");
        String expect = "Starts with a consonant";

boolean passed = getResults(expect, output, "Running main");
        assertTrue(passed);
    }

@Test
    public void test2()
    {
        String code = getCodeWithoutComments();
        int count = countOccurences(code, "substring(0,1)");
        boolean passed = count >= 1;

getResults("1 or more", "" + count, "Counting number of substring(0, 1)", passed);
        assertTrue(passed);
    }

@Test
    public void test3()
    {
        String code = getCodeWithoutComments();
        int count = countOccurences(code, ".equals(");
        boolean passed = count == 5;

getResults("1 or more", "" + count, "Counting number of .equals()", passed);
        assertTrue(passed);
    }
}

🔗

Activity 12.11.10.

Write code that prints the letter grade with your score. For a score greater than 90, it should print A. For a score between 80 and 90, it should print B. For a score between 70 and 80, it should print C. For a score between 60 and 70, it should print D. For all other scores, it should print E.

🔗

public class Test1
{
    public static void main(String[] args)
    {
        int score = 73;
        // Add your code here
    }
}
====
import static org.junit.Assert.*;

import org.junit.*;

import java.io.*;

public class RunestoneTests extends CodeTestHelper
{
    public RunestoneTests()
    {
        super("Test1");
    }

@Test
    public void test1()
    {
        String output = getMethodOutput("main");
        String expect = "C";

boolean passed = getResults(expect, output, "Running main");
        assertTrue(passed);
    }

@Test
    public void test2()
    {
        String code = getCodeWithoutComments();
        int count = countOccurences(code, "if");
        boolean passed = getResults("" + 4, "" + count, "Counting number of ifs");
        assertTrue(passed);
    }

@Test
    public void test3()
    {
        String code = getCodeWithoutComments();
        int count = countOccurences(code, "else");
        boolean passed = getResults("" + 4, "" + count, "Counting number of elses");
        assertTrue(passed);
    }

@Test
    public void test4()
    {
        String code = getCodeWithoutComments();
        int count = countOccurences(code, "else if");
        boolean passed = getResults("" + 3, "" + count, "Counting number of else ifs");
        assertTrue(passed);
    }
}

🔗

Activity 12.11.11.

Complete the get_mid(str) method in the StringWorker class to return the middle character if the string has an odd number of characters and the middle two characters if the string has an even number of characters. For example, get_mid("way") should return "a" and get_mid("away") should return "wa".

🔗

public class StringWorker
{
    public static String get_mid(String str)
    {
        // Add your code here
        return ""; // change the return value
    }

public static void main(String[] args)
    {
        System.out.println(get_mid("way") + " should be \"a\"");
        System.out.println(get_mid("away") + " should be \"wa\"");
    }
}
====
import static org.junit.Assert.*;

import org.junit.*;

import java.io.*;

public class RunestoneTests extends CodeTestHelper
{
    public RunestoneTests()
    {
        super("StringWorker");
    }

@Test
    public void test1()
    {
        String output = getMethodOutput("main");
        String expect = "a should be \"a\"\nwa should be \"wa\"";

boolean passed = getResults(expect, output, "Running main");
        assertTrue(passed);
    }

@Test
    public void test2()
    {
        String actual = StringWorker.get_mid("candy");
        String expect = "n";
        boolean passed = getResults(expect, actual, "Testing get_mid(\"candy\")");
        assertTrue(passed);
    }
}

🔗

CSAwesome2 AP CSA Java 2025+

Section 12.11 Unit 2a Write Code for Toggle Code

Activity 12.11.1.

Activity 12.11.2.

Activity 12.11.3.

Activity 12.11.4.

Activity 12.11.5.

Activity 12.11.6.

Activity 12.11.7.

Activity 12.11.8.

Activity 12.11.9.

Activity 12.11.10.

Activity 12.11.11.