单选题1. public class ArrayTest {  2. public static void main (String[]args)  {  3. float f1[], f2[];  4. f1 = new float [10];  5. f2 = f1;  6. System.out.printIn (“f2[0]=” + f2[0]);  7.  }  8. }   What is the result?()A It prints f2[0] = 0.0B It prints f2[0] = NaNC An error at line 5 causes compile to fail.D An error at line 6 causes compile to fail.E An error at line 6 causes an exception at runtime.

单选题
1. public class ArrayTest {  2. public static void main (String[]args)  {  3. float f1[], f2[];  4. f1 = new float [10];  5. f2 = f1;  6. System.out.printIn (“f2[0]=” + f2[0]);  7.  }  8. }   What is the result?()
A

 It prints f2[0] = 0.0

B

 It prints f2[0] = NaN

C

 An error at line 5 causes compile to fail.

D

 An error at line 6 causes compile to fail.

E

 An error at line 6 causes an exception at runtime.


参考解析

解析: 暂无解析

相关考题:

以下Java应用程序执行入口main方法的声明中,正确的是( )。 A.public static void main()B.public static void main(String[] args)C.public static int main(String[] args)D.public void main(String[] args)

下面代码的运行结果是( )。 public class ConcatTest { public static void main (String[ ] args) { String str1 = "abc"; String str2 = "ABC"; String str3 = str1. coneat(str2); System. out. println(str3); } }A.abcB.ABCC.abcABCD.ABCabc

下列程序的运行结果是______。include class Base { public: void f(int x){cout 下列程序的运行结果是______。include<iostream.h>class Base{public:void f(int x){cout<<“Base:”<<x<<endl;});class Derived:public Base{public:void f(char*str){cout<<“Derived:”<<str<<endl;}};void main(void){Base*pd=ne

阅读下面程序 public class ConcatTest{ public static void main(String[] args) { String strl = "abc"; String str2 = "ABC"; String str3 = str1.concat(str2); System.out.println(str3); } } 程序的运行结果是:A.abeB.ABCC.abcABCD.ABCabc

写出程序的输出结果public abstract class A{public A(){Console.WriteLine('A');}public virtual void Fun(){Console.WriteLine("A.Fun()");}}public class B: A{public B(){Console.WriteLine('B');}public new void Fun(){Console.WriteLine("B.Fun()");}public static void Main(){A a = new B();a.Fun();}}

以下哪个是Java应用程序main方法的有效定义? A. public static void main();B. public static void main( String args );C. public static void main( String args[] );D. public static void main( Graphics g );E. public static boolean main( String a[] );

以下是JAVA中正确的入口方法是? () A、 public static void main(String[] args){}B、 public static void main(String args){}C、 public void main(String[] args){}D、 public static int main(String[] args){}

public class TestString 1 {  public static void main(String[] args) {  String str = “420”;  str += 42;  System.out.print(str);  }  }  What is the output?()A、 42B、 420C、 462D、 42042E、 Compilation fails.F、 An exception is thrown at runtime.

1. public class Outer{  2. public void someOuterMethod() {  3. // Line 3  4. }  5. public class Inner{}  6. public static void main( String[]argv ) {  7. Outer o = new Outer();  8. // Line 8  9. }  10. }  Which instantiates an instance of Inner?()  A、 new Inner(); // At line 3B、 new Inner(); // At line 8C、 new o.Inner(); // At line 8D、 new Outer.Inner(); // At line 8

Which declarations will allow a class to be started as a standalone program?()  A、public void main(String args[])B、public void static main(String args[])C、public static main(String[] argv)D、final public static void main(String [] array)E、public static void main(String args[])

1. public class A {  2. void A() {  3. System.out.println(“Class A”);  4. }  5. public static void main(String[] args) {  6. new A();  7. }  8. }  What is the result?()  A、 Class AB、 Compilation fails.C、 An exception is thrown at line 2.D、 An exception is thrown at line 6.E、 The code executes with no output.

Public class test (  Public static void main (String args[])  (  System.out.printIn (6 ^ 3);  )  )   What is the output?()

下列有关main()方法的签名正确的是哪些?()A、 public static void main(String[] args){}B、 public static void main(){}C、 public static void main(String args[]){}D、 public void static main(String[] args){}

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、 TestAB、 TestBC、 Compilation fails.D、 An exception is thrown at runtime.

public class Test {  public static void main(String[] args) {  String str = NULL;  System.out.println(str);  }  }   What is the result?()  A、 NULLB、 Compilation fails.C、 The code runs with no output.D、 An exception is thrown at runtime.

下面关于Java应用程序中main方法的写法,合法的是()。A、public static void main()B、public static void main(Stringargs[])C、public static int main(String[]arg)D、public void main(Stringarg[])

main方法是Java程序执行的入口点,关于main方法的方法头以下哪项是合法的()?A、public static void main( )B、public static void main( String args[] )C、public static int main(String [] arg )D、public void main(String arg[] )

声明Java独立应用程序main()方法时,正确表达是()。A、public static void main(String[]args){…}B、private static void main(String args[]){…}C、public void main(String args[]){…}D、public static void main(){…}

下面哪些main方法可用于程序执行()A、public static void main(String[]args)B、public static void main(String[]x)C、public static void main(Stringargs[])D、public void main(String[]args)

多选题Which declarations will allow a class to be started as a standalone program?()Apublic void main(String args[])Bpublic void static main(String args[])Cpublic static main(String[] argv)Dfinal public static void main(String [] array)Epublic static void main(String args[])

多选题现有2 个文件:  1. package x;  2. public class X {  3. public static void doX() { System.out.print("doX "); }  4. }  和:  1. class Find {  2. public static void main(String [] args) {  3. //insert code here  4. }  5. }  哪两行分别插入到类Find 的第3 行将编译并产生输出“doX”? ()AdoX();BX.doX();Cx.X.doX();Dx.X myX = new x.X(); myX.doX();

单选题public class TestString 1 {  public static void main(String[] args) {  String str = “420”;  str += 42;  System.out.print(str);  }  }  What is the output?()A 42B 420C 462D 42042E Compilation fails.F An exception is thrown at runtime.

单选题Given classes defined in two different files:  1. package util;  2. public class BitUtils {  3. public static void process(byte[]) { /* more code here */ }  4. }  1. package app;  2. public class SomeApp {  3. public static void main(String[] args) {  4. byte[] bytes = new byte[256];  5. // insert code here  6. }  7. }  What is required at line 5 in class SomeApp to use the process method of BitUtils?()A process(bytes);B BitUtils.process(bytes);C util.BitUtils.process(bytes);D SomeApp cannot use methods in BitUtils.E import util.BitUtils.*; process(bytes);

单选题1. public class SimpleCalc {  2. public int value;  3. public void calculate() { value += 7; }  4. } And:  1. public class MultiCalc extends SimpleCalc {  2. public void calculate() { value -= 3; }  3. public void calculate(int multiplier) {  4. calculate();  5. super.calculate();  6. value *=multiplier;  7. }  8. public static void main(String[] args) {  9. MultiCalc calculator = new MultiCalc();  10. calculator.calculate(2);  11. System.out.println(”Value is: “+ calculator.value);  12. }  13. }  What is the result?()A Value is: 8B Compilation fails.C Value is: 12D Value is: -12E The code runs with no output.F An exception is thrown at runtime.

单选题以下是JAVA中正确的入口方法是? ()A public static void main(String[] args){}B public static void main(String args){}C public void main(String[] args){}D public static int main(String[] args){}

填空题Public class test (    Public static void main (String args) (   System.out.printIn (6^3);   )   )   What is the output? ()

单选题public class Test {  public static void main(String[] args) {  String str = NULL;  System.out.println(str);  }  }   What is the result?()A NULLB Compilation fails.C The code runs with no output.D An exception is thrown at runtime.

单选题1. public class A {  2. void A() {  3. System.out.println(“Class A”);  4. }  5. public static void main(String[] args) {  6. new A();  7. }  8. }  What is the result?()A Class AB Compilation fails.C An exception is thrown at line 2.D An exception is thrown at line 6.E The code executes with no output.