SCJP程序员认证考试

单选题//point X  public class foo { public static void main (String[]args) throws Exception {  java.io.printWriter out = new java.io.PrintWriter {  new java.io.outputStreamWriter (System.out), true;  out.printIn(“Hello”); }  }  }   Which statement at PointX 

题目
单选题
//point X  public class foo { public static void main (String[]args) throws Exception {  java.io.printWriter out = new java.io.PrintWriter {  new java.io.outputStreamWriter (System.out), true;  out.printIn(“Hello”); }  }  }   Which statement at PointX on line 1 allows this code to compile and run?()
A

 Import java.io.*;

B

 Include java.io.*;

C

 Import java.io.PrintWriter;

D

 Include java.io.PrintWriter;

E

 No statement is needed.

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相似问题和答案

第1题:

//point X  public class foo (  public static void main (String[]args) throws Exception {  printWriter out = new PrintWriter (new  java.io.outputStreamWriter (System.out), true;  out.printIn(“Hello”);  }  )   Which statement at PointX on line 1 allows this code to compile and run?()  

  • A、 Import java.io.PrintWriter;
  • B、 Include java.io.PrintWriter;
  • C、 Import java.io.OutputStreamWriter;
  • D、 Include java.io.OutputStreamWriter;
  • E、 No statement is needed.

正确答案:A

第2题:

public class Test {  public static void aMethod() throws Exception {  try {  throw new Exception(); } finally {  System.out.println(“finally”);  }  }  public static void main(String args[]) {  try {  aMethod();  } catch (Exception e) {  System.out.println(“exception”);  }  System.out.println(“finished”);  }  }  What is the result?()  

  • A、 finally
  • B、 exception finished
  • C、 finally exception finished
  • D、 Compilation fails.

正确答案:C

第3题:

下列程序段的输出是( )。 public class Test { public static void main (String args[ ]) { String ss1 = new String("hello"); String ss2 = new String("hello"); System.out.println(ssl == ss2); System.out.println (ssequals(ss2)); } }

A.true, false

B.true, true

C.false, true

D.false, false


第4题:

 public class X {   public static void main (String[]args)   {   string s = new string (“Hello”);   modify(s);   System.out.printIn(s);   }   public static void modify (String s)  {   s += “world!”;      }   }      What is the result?()    

  • A、 The program runs and prints “Hello”
  • B、 An error causes compilation to fail.
  • C、 The program runs and prints “Hello world!”
  • D、 The program runs but aborts with an exception.

正确答案:A

第5题:

//point X   public class foo {  public static void main (Stringargs) throws Exception {   java.io.printWriter out = new java.io.PrintWriter {   new java.io.outputStreamWriter (System.out), true;   out.printIn(“Hello”);   }   } }   Which statement at PointX on line 1 allows this code to compile and run?()  

  • A、 Import java.io.*;
  • B、 Include java.io.*;
  • C、 Import java.io.PrintWriter;
  • D、 Include java.io.PrintWriter;
  • E、 No statement is needed.

正确答案:E

第6题:

class TestA {  public void start() { System.out.println(”TestA”); }  }  public class TestB extends TestA {  public void start() { System.out.println(”TestB”); } public static void main(String[] args) {  ((TestA)new TestB()).start();  }  }  What is the result?() 

  • A、 TestA
  • B、 TestB
  • C、 Compilation fails.
  • D、 An exception is thrown at runtime.

正确答案:B

第7题:

//point X  public class foo { public static void main (String[]args) throws Exception {  java.io.printWriter out = new java.io.PrintWriter {  new java.io.outputStreamWriter (System.out), true;  out.printIn(“Hello”); }  }  }   Which statement at PointX on line 1 allows this code to compile and run?()  

  • A、 Import java.io.*;
  • B、 Include java.io.*;
  • C、 Import java.io.PrintWriter;
  • D、 Include java.io.PrintWriter;
  • E、 No statement is needed.

正确答案:E

第8题:

public class Base {  public static final String FOO = “foo”;  public static void main(String[] args) {  Base b = new Base();  Sub s = new Sub();  System.out.print(Base.FOO);  System.out.print(Sub.FOO);  System.out.print(b.FOO);  System.out.print(s.FOO);  System.out.print(((Base)s).FOO);  } }  class Sub extends Base {public static final String FOO=bar;}  What is the result?() 

  • A、 foofoofoofoofoo
  • B、 foobarfoobarbar
  • C、 foobarfoofoofoo
  • D、 foobarfoobarfoo
  • E、 barbarbarbarbar
  • F、 foofoofoobarbar
  • G、 foofoofoobarfoo

正确答案:D

第9题:

public class Foo {  private int val;  public foo(int v) (val = v;)  }  public static void main (String [] args)  {  Foo a = new Foo (10);  Foo b = new Foo (10);  Foo c = a;  int d = 10;  double e = 10.0;  }  Which three logical expression evaluate to true?()

  • A、 (a ==c)
  • B、 (d ==e)
  • C、 (b ==d)
  • D、 (a ==b)
  • E、 (b ==c)
  • F、 (d ==10.0)

正确答案:A,B,F

第10题:

//point X    public class foo (   public static void main (Stringargs) throws Exception {   printWriter out = new PrintWriter (new )  java.io.outputStreamWriter (System.out), true;   out.printIn(“Hello”);    }   )   Which statement at PointX on line 1 allows this code to compile and run?()

  • A、 Import java.io.PrintWriter;
  • B、 Include java.io.PrintWriter;
  • C、 Import java.io.OutputStreamWriter;
  • D、 Include java.io.OutputStreamWriter;
  • E、 No statement is needed.

正确答案:A

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