问题:多选题public class X { public X aMethod() { return this;} } public class Y extends X { } Which two methods can be added to the definition of class Y?()Apublic void aMethod() {}Bprivate void aMethod() {}Cpublic void aMethod(String s) {}Dprivate Y aMethod...
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问题:单选题public class test( public static void main(stringargs){ string foo = args [1]; string foo = args ; string foo = args ; } ) And command line invocation: Java Test red green blue What is the result? ()A Baz has the value of “”B Baz has ...
问题:1. class super { 2. public float getNum() {return 3.0f;} 3...
问题:单选题Which gets the name of the parent directory file “file.txt”?()A String name= File.getParentName(“file.txt”);B String name= (new File(“file.txt”)).getParent();C String name = (new File(“file.txt”)).getParentName();D String name= (new File(“file.txt”...
问题:Choose the three valid identifiers from those listed below.(...
问题:int i = 0; while (true) { if(i==4) { break; } ++i; } S...
问题:单选题1. public class SwitchTest { 2. public static void main (String []args) { 3. System.out.PrintIn(“value =” +switchIt(4)); 4. } 5. public static int switchIt(int x) { 6. int j = 1; 7. switch (x) { 8. case 1: j++; 9. case 2: j++; 10. case 3: j+...
问题:public class X implements Runnable( private int x; priv...
问题:多选题11. public interface Status { 12. /* insert code here */ int MY_VALUE = 10; 13. } Which three are valid on line 12?()AfinalBstaticCnativeDpublicEprivateFabstractGprotected...
问题:单选题1. public class ForBar { 2. public static void main(String []args) { 3. int i = 0, j = 5; 4. tp: for (;;) { 5. i ++; 6. for(;;) 7. if(i --j) break tp; 8. } 9. system.out.printIn(“i = ” + i + “, j = “+ j); 10. } 11. } What is the resu...
问题:Which of these are keywords in Java?() ...
问题:public class X { public object m () { object o = new flo...
问题:public class X { public static void main(String [] args) { ...
问题:单选题Which statements, when inserted at the indicated position in the following code, will cause a runtime exception when attempting to run the program?() class A {} class B extends A {} class C extends A {} public class Q3ae4 { public static void...
问题:单选题import java.util.*; class KeyMaster { public int i; public KeyMaster(int i) { this.i = i; } public boolean equals(Object o) { return i == ((KeyMaster)o).i; } public int hashCode() { return i; } } public class MapIt { public static void main(Str...
问题:填空题3. string foo = “ABCDE”; 4. foo.substring(3); 5. foo.concat(“XYZ”); 6. Type the value of foo at line 6.()...
问题:public class Item { private String desc; public String get...
问题:interface DeclareStuff{ public static final int EASY = 3; ...
问题:10. class Line { 11. public class Point { public int x,y; }...
问题:单选题public class Test { public static void add3 (Integer i) { int val = i.intValue(); val += 3; i = new Integer(val); } public static void main(String args[]) { Integer i = new Integer(0); add3(i); System.out.println(i.intValue()); } } What is ...