Import java.io.*;
Include java.io.*;
Import java.io.PrintWriter;
Include java.io.PrintWriter;
No statement is needed.
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?()
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?()
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?()
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?()
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?()
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?()
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?()
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?()
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?()