【简答题】请阅读下面的程序,在空白处填写正确的代码。 public class Demo{ public static void main(String[] args){ short s = 10 ; s = (____)(s + 10) ; System.out.println(s); } }
【单选题】定义类: package utils; public class Rep{ public static String twice (String s){return s+s ;) } 再定义另一个类Demo: l.//insert code here 2.public class Demo{ 3. public static vo...
C.
import static utils.Rep.twice;
D.
static import utils.Rep.twice;
【单选题】以下程序运行结果是( )。 class FatherX{ public Integer getX() { return new Integer(10); } } class Son extends FatherX{ public Double getX() { return new Double(20); } } public class Demo12 { public static voi...
【单选题】药物粒子大小能够改变作用的位置,在气体分散系统中,能起到肺部局部作用的药物粒子粒径为
【简答题】class Dog{ public String name; Dog(String name){ this.name =name; }}public class Demo1{ public static void main(String[] args){ Dog dog1 = new Dog("xiaohuang"); Dog d...
【单选题】已知如下代码: 1: class Example{ 2: String str; 3: public Example(){ 4: str= "example"; 5: } 6: public Example(String s){ 7: str=s; 8: } 9:} } 10: class Demo extends Example{ 11: } 12: public class Test{ 13:...
【单选题】(7-1)以下程序运行结果是( )。 class FatherX{ public Integer getX() { return new Integer(10); } } class Son extends FatherX{ public Double getX() { return new Double(20); } } public class Demo12 { public stati...
【单选题】阅读下列代码public class Demo{ public static void main(String [] args){ String s; System.out.println("s="+s); }}输出结果应该是:()
C.
由于String s没有初始化,代码不能编译通过
D.
代码得到编译,但捕获到NullPointException异常
【单选题】Paul is much taller than any other boy in his class. So Paul is _______ boy in his class.