第1题:
1. public interface A { 2. public void doSomething(String thing); 3. } 1. public class AImpl implements A { 2. public void doSomething(String msg) { } 3. } 1. public class B { 2. public A doit() { 3. // more code here 4. } 5. 6. public String execute() { 7. // more code here 8. } 9. } 1. public class C extends B { 2. public AImpl doit() { 3. // more code here 4. } 5. 6. public Object execute() { 7. // more code here 8. } 9. } Which statement is true about the classes and interfaces in the exhibit?()
第2题:
1. public class A { 2. void A() { 3. System.out.println(“Class A”); 4. } 5. public static void main(String[] args) { 6. new A(); 7. } 8. } What is the result?()
第3题:
下面程序的输出为( )。 public class Test { public static void main (String args[]) { int x,y; x=1; y=2; System.out.println("The output is"+x+y); } }
A.The output is xy
B.The output is 3
C.The output is 12
D.The output is x=1 y=2
第4题:
What will be written to the standard output when the following program is run?() public class Qd803 { public static void main(String args[]) { String word = "restructure"; System.out.println(word.substring(2, 3)); } }
第5题:
Public class test ( Public static void main (String args[]) ( System.out.printIn (6 ^ 3); ) ) What is the output?()
第6题:
Which declarations will allow a class to be started as a standalone program?()
第7题:
package test1; public class Test1 { static int x = 42; } package test2; public class Test2 extends test1.Test1 { public static void main(String[] args) { System.out.println(“x = “ + x); } } What is the result?()
第8题:
已知如下代码: public class Test long a[]=new long[10] public static void main (String args[]{ System.out.println(a[6];} 以下( )语句是正确的。
A.Output is null.
B.When running,some error will occur.
C.When compile,some error will occur.
D.Output is 0.
第9题:
Public class test ( Public static void stringReplace (String text) ( Text = text.replace (‘j’ , ‘i’); ) public static void bufferReplace (StringBuffer text) ( text = text.append (“C”) ) public static void main (String args[]} ( String textString = new String (“java”); StringBuffer text BufferString = new StringBuffer (“java”); stringReplace (textString); BufferReplace (textBuffer); System.out.printLn (textString + textBuffer); ) ) What is the output?()
第10题:
public class Test { public static void main(String[] args) { String str = NULL; System.out.println(str); } } What is the result?()