Throws Exception.
Catch (Exception e).
Throws RuntimeException.
Catch (TestException e).
No code is necessary.
第1题:
public class ExceptionTest { class TestException extends Exception {} public void runTest () throws TestException {} public void test () /* Point X*/ { runTest (); } } At point X on line 4, which code can be added to make the code compile?()
第2题:
public class Team extends java.util.LinkedList { public void addPlayer(Player p) { add(p); } public void compete(Team opponent) { /* more code here */ } } class Player { /* more code here */ } Which two are true?()
第3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?()
第4题:
public class TestA{ public void methodA() throws IOException{ //…… } } public class TestB extends TestA{ public void methodA() throws EOFException{ //…… } } public class TestC extends TestA{ public void methodA() throws Exception{ //…… } } 当编译类TestC的时候,结果是哪项?()
第5题:
// Point X public class foo { public static void main(String[] args) throws Exception { jave.io.PrintWriter out = new jave.io.PrintWriter( new jave.io.OutputStreamWriter(System.out), true); out.println(“Hello”); } } Which statement at Point X on line 1 is required to allow this code to compile?()
第6题:
public abstract class Shape { private int x; private int y; public abstract void draw(); public void setAnchor(int x, int y) { this.x = x; this.y = y; } } Which two classes use the Shape class correctly?()
第7题:
No code is necessary.
throws Exception
catch ( Exception e )
throws RuntimeException
catch ( TestException e)
第8题:
The code will compile without changes.
The code will compile if public Tree() { Plant(); } is added to the Tree class.
The code will compile if public Plant() { Tree(); } is added to the Plant class.
The code will compile if public Plant() { this(”fern”); } is added to the Plant class.
The code will compile if public Plant() { Plant(”fern”); } is added to the Plant class.
第9题:
正常
编译错误
运行错误
以上都不对
第10题:
public void aMethod() {}
private void aMethod() {}
public void aMethod(String s) {}
private Y aMethod() { return null; }
public X aMethod() { return new Y(); }
第11题:
public class Circle implements Shape { private int radius; }
public abstract class Circle extends Shape { private int radius; }
public class Circle extends Shape { private int radius; public void draw(); }
public abstract class Circle implements Shape { private int radius; public void draw(); }
public class Circle extends Shape { private int radius;public void draw() {/* code here */} }
public abstract class Circle implements Shape { private int radius;public void draw() { / code here */ } }
第12题:
Throws Exception.
Catch (Exception e).
Throws RuntimeException.
Catch (TestException e).
No code is necessary.
第13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?()
第14题:
interface A { public int getValue() } class B implements A { public int getValue() { return 1; } } class C extends B { // insert code here } Which three code fragments, inserted individually at line 15, make use of polymorphism?()
第15题:
public class Plant { private String name; public Plant(String name) { this.name = name; } public String getName() { return name; } } public class Tree extends Plant { public void growFruit() { } public void dropLeaves() { } } Which is true?()
第16题:
Given the following code, write a line of code that, when inserted at the indicated location, will make the overriding method in Extension invoke the overridden method in class Base on the current object. class Base { public void print( ) { System.out.println("base"); } } class Extention extends Base { public void print( ) { System.out.println("extension"); // insert line of implementation here } } public class Q294d { public static void main(String args[]) { Extention ext = new Extention( ); ext.print( ); } } Fill in a single line of implementation.()
第17题:
Consider the following class: class Test(int i) { void test(int i) { System.out.println(“I am an int.”); } void test(String s) { System.out.println(“I am a string.”); } public static void main(String args) { Test t=new Test(); char ch=“y”; t.test(ch); } } Which of the statements below is true?()
第18题:
10. class Line { 11. public class Point { public int x,y; } 12. public Point getPoint() { return new Point(); } 13. } 14. class Triangle { 15. public Triangle() { 16. // insert code here 17. } 18. } Which code, inserted at line 16, correctly retrieves a local instance of a Point object?()
第19题:
No statement is required.
import jave.io.*;
include java.io.*;
import jave.io.PrintWriter;
include java.io.PrintWriter;
第20题:
Line 33 must be called within a try block.
The exception thrown by method1 in class a is not required to be caught.
The method declared on line 31 must be declared to throw a RuntimeException.
On line 5 of class a, the call to method2 of class b does not need to be placed in a try/catch block.
第21题:
Point p = Line.getPoint();
Line.Point p = Line.getPoint();
Point p = (new Line()).getPoint();
Line.Point p = (new Line()).getPoint();
第22题:
Import java.io.PrintWriter;
Include java.io.PrintWriter;
Import java.io.OutputStreamWriter;
Include java.io.OutputStreamWriter;
No statement is needed.
第23题:
Line 5 will not compile, because void methods cannot be overridden.
Line 12 will not compile, because there is no version of test() that rakes a charargument.
The code will compile but will throw an exception at line 12.
The code will compile and produce the following output: I am an int.
The code will compile and produce the following output: I am a String.
第24题:
Class a will not compile.
Line 46 can throw the unchecked exception TestException.
Line 45 can throw the unchecked exception TestException.
Line 46 will compile if the enclosing method throws a TestException.
Line 46 will compile if enclosed in a try block, where TestException is caught.