现有:class Test2 fpublic static void main (String [] args) {short a,b,C;a=1;b=2;C=a+b;a+=2;}}以上代码中,哪一句是错误的?()
第1题:
下列代码的执行结果是( )。 public class Test2 { public static void main(String arg[]) { System.out.println(100%3); System.out.println(100%3.0); }}
A.1和1
B.1和1.0
C.1.0和1
D.1.0和1.0
第2题:
现有: class Tree { private static String tree = "tree "; String getTree () { return tree; } } class Elm extends Tree { private static String tree = "elm "; public static void main (String [] args) { new Elm() .go (new Tree()) ; } } void go (Tree t) { String s = t.getTree () +Elm.tree + tree + (new Elm() .getTree ()) ; System.out.println (s) ;} 结果为:()
第3题:
Which statement about static inner classes is true?()
第4题:
Which thefollowingstatements about static inner classes is true?()
第5题:
public class OuterClass { private double d1 1.0; //insert code here } You need to insert an inner class declaration at line2. Which two inner class declarations are valid?()
第6题:
现有: class Test2 f public static void main (String [] args) { short a,b,C; a=l; b=2; C=a+b; a+=2: } 以上代码中,哪一句是错误的?()
第7题:
现有: class Top { static int x=l; public Top (inty) { x*=3; } } class Middle extends Top { public Middle() {x+=1; ) public static void main (String [] args) { Middle m = new Middle(); System. out .println (x); } } 结果为:()
第8题:
2
3
4
编译失败
第9题:
x = 0
x = 42
Compilation fails because of an error in line 2 of class Test2.
Compilation fails because of an error in line 3 of class Test1.
Compilation fails because of an error in line 4 of class Test2.
第10题:
A static inner class requires a static initializer.
A static inner class requires an instance of the enclosing class.
A static inner class has no reference to an instance of the enclosing class.
A static inner class has access to the non-static members of the outer class.
Static members of a static inner class can be referenced using the class name of the static inner class.
第11题:
1
2
3
编译失败
第12题:
0123
012456789
0123456789
012
第13题:
阅读下面程序 public class Test2 ______ { public static void main(String[] args) { Thread t=new Test2(); t.start(); } public void run() { System.out.println("How are you."); } } 程序中下画线处应填入的正确选项是
A.implements Thread
B.extends Runnable
C.implements Runnable
D.extends Thread
第14题:
现有: class TestMain { static int x = 2; static { x = 4; } static public void main(String[] args) { int y = x + 1; System.out.println(y); } } 和命令行: java TestMain 结果为:()
第15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16题:
现有: class TestApp{ public static void main (String[] args){ for (int i=0; i
第17题:
Which statements about static inner classes are true?()
第18题:
1. public class OuterClass { 2. private double d1 = 1.0; 3. // insert code here 4. } Which two are valid if inserted at line 3?()
第19题:
a=1;
C=a+b;
a+=2;
shorta,b,C;
第20题:
An anonymous class can be declared as static.
A static inner class cannot be a static member of the outer class.
A static inner class does not require an instance of the enclosing class.
Instance member of a static inner class can be referenced using the class name of the staticinner class.
第21题:
a=1:
C=a+b;
a+=2;
short a,b,C;
第22题:
Z=21
Z=22
Z=23
Z= 24
第23题:
An anonymous class can be declared as static.
A static inner class cannot be a static member of the outer class.
A static inner class does not require an instance of the enclosing class.
Instance members of a static inner class can be referenced using the class name of the static inner class.