Lesson – 7 Labs 1. interface Shape{ public void draw(); } class Circle implements Shape{ public void draw(){ System.out.println(“Drawing a circle”); } } class Square implements Shape{ public void draw(){ System.out.println(“Drawing a square”); } } public class Demo{ public static…
1. What is the result of the following code? 1. interface Climb { 2. boolean isTooHigh(int height, int limit); 3. } 4. 5. public class Climber { 6. public static void main(String[] args) { 7. check((h, m) -> h.append(m).isEmpty(), 5); 8. } 9. private static void check(Climb climb, int…
1. Which of the following statements can be inserted in the blank line sothat the code will compile successfully? interface CanHop {}public class Frog implements CanHop {public static void main(String[] args) {_ frog = new TurtleFrog();}}class BrazilianHornedFrog extends Frog {}class…
Lesson – 9 1. import java.util.*; import java.util.ArrayList; import java.util.Collection; public class Demo{ public static void main(String[] args){ Collection<String> city = new ArrayList<>(); city.add(“Chicago”); city.add(“Boston”); city.add(“Austin”); city.add(“Seattle”); city.add(“Nashville”); city.remove(“Austin”); city.remove(“Chicago”); System.out.print(city); …
Lesson-5 public int add(int x, int y){ int sum = x + y; return sum; } public static void main(String args[]){ Addition obj = new Addition(); int sum = obj.add(10, 20); System.out.println(“The sum of 10 and 20 is ” +…
1.How many of the following lines contain a compiler error?long min1 = 123.0, max1 = 987L;final long min2 = 1_2_3, max2 = 9 _ 8 _ 7;long min3 = 123, int max3 = 987;long min4 = 123L, max4 = 987;long…
1. Which of the following can fill in the blank in this code to make it compile? public class Ant { _______ void method() {} } Each correct answer represents a complete solution. Choose all that apply. A) Final Private 2. Which…
1.Which is the first line containing a compiler error?String url = “jdbc:hsqldb:file:zoo”;try (var conn = DriverManager.getConnection(url);var ps = conn.prepareStatement();var rs = ps.executeQuery(“SELECT * FROM swings”)) {while (rs.next()) {System.out.println(rs.getInteger(1));}}A) Line 3 2.Which interfaces or classes are in a database-specific JAR file?Each…
import java.io.*; import java.util.*; public class Test{ public static void main(String[] args){ Scanner in = new Scanner(System.in); String string1,string2; string1 = in.nextLine(); string2 = in.nextLine(); if(string1.equals(string2)) System.out.println(“The two strings are equal.”); else System.out.println(“The two strings are not equal.”); } }…
1.Which of the following correctly create Path instances?Each correct answer represents a complete solution. Choose all that apply.A) FileSystems.getDefault().getPath(“puma.txt”) new java.io.File(“tiger.txt”).toPath() Path.of(Path.of(“.”).toUri()) 2.Suppose that the working directory is /weather and the absolute path represents a file that exists within the…
