If ignited, which of the listed materials would be a class "B" fire?()
public class test { public static void main(String [] a) { assert a.length == 1; } } Which two will produce an AssertionError?()
abstract class abstrctIt { abstract float getFloat (); } public class AbstractTest extends AbstractIt { private float f1= 1.0f; private float getFloat () {return f1;} } What is the result?()
Any extinguishing agent used on a Class “C” fire must have which important property? ()
This bar chart shows how many times a class of children hit a target with a set of ten beanbags. How many children hit the target fewer than 7 times?
public class WhileFoo { public static void main (String args) { int x= 1, y = 6; while (y--) {x--;} system.out.printIn(“x=” + x “y =” + y); } } What is the result?()
1. class TestA { 2. TestB b; 3. TestA() { 4. b = new TestB(this); 5. } 6. } 7. class TestB { 8. TestA a; 9. TestB(TestA a) { 10. this.a = a; 11. } 12. } 13. class TestAll { 14. public static void main (String args[]) { 15. new TestAll().makeThings(); 16. // ...code continues on 17. } 18. void makeThings() { 19. TestA test = new TestA(); 20. } 21. } Which two statements are true after line 15, before main completes?()
final class Tree { private static String tree = "tree "; String getTree() { return tree; } } class Elm extends Tree { private static String tree = "elm "; public static void main(String [] args) { new Elm().go(new Tree()); } void go(Tree t) { String s = t.getTree()+Elm.tree+tree+(new Elm().getTree()); System.out.println(s); } } 结果为:()
public class ArrayTest { public static void main(String[] args) { float fl[], f2[]; fl = new float[10]; f2 = f1; System.out.println(“f2[0]= “ + f2[0]); } } What is the result?()
class One { public One foo() { return this; } } class Two extends One { public One foo() { return this; } } class Three extends Two { // insert method here } Which two methods, inserted individually, correctly complete the Three class?()