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.

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.


参考解析

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单选题static void test() throws Error {  if (true) throw new AssertionError();  System.out.print(”test “);  }  public static void main(String[] args) {  try { test(); }  catch (Exception ex) { System.out.print(”exception “); }  System.out.print(”elld “);  }  What is the result?()A endB Compilation fails.C exception endD exception test endE A Throwable is thrown by main.F An Exception is thrown by main.

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单选题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 foofoofoofoofooB foobarfoobarbarC foobarfoofoofooD foobarfoobarfooE barbarbarbarbarF foofoofoobarbarG foofoofoobarfoo

单选题public class Test {  public static void replaceJ(string text)  {  text.replace (‘j’, ‘l’);  }  public static void main(String args[])  {  string text = new String (“java”)  replaceJ(text);  system.out.printIn(text);  }  }      What is the result?()A The program prints “lava”B The program prints “java”C An error at line 7 causes compilation to fail.D Compilation succeeds but the program throws an exception.