Section 1.21 Toggle Code Practice 1b (1.7-1.15)

For each of the coding problems below, write your own solution. If you get stuck, click the Get Help button for a personalized mixed-up code problem built from your current attempt.

Activity 1.21.1.

Write code that prints a random number from 1 to 50.

public class Test1
{
    public static void main(String[] args)
    {
        // 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 = "Any number between 1 and 50";
        int out = Integer.parseInt(output);

boolean passed = (out > 0) && (out <= 50);

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

@Test
    public void test2()
    {
        boolean passed = checkCodeContains("Math.random()");
        assertTrue(passed);
    }

@Test
    public void test3()
    {
        boolean passed = checkCodeContains("50");
        assertTrue(passed);
    }

@Test
    public void test4()
    {
        boolean passed = checkCodeContains("+1");
        assertTrue(passed);
    }

@Test
    public void test5()
    {
        boolean passed = checkCodeContains("(int)");
        assertTrue(passed);
    }
}

Activity 1.21.2.

Write code that prints the first 2 characters of the message followed by the last 2 characters of the message using the appropriate String methods.

Activity 1.21.3.

Write code that prints the first letters in first, middle, and last in lowercase letters using the appropriate String methods.

Activity 1.21.4.

Write code that prints the message in all uppercase letters using the appropriate String methods.

Activity 1.21.5.

Write code that prints the first 3 letters of the message in uppercase letters using the appropriate String methods.

Activity 1.21.6.

Write code that print the part of the message starting with the word “nice” using the appropriate String methods.

You have attempted of activities on this page.

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