下列是一个Java应用程序,输出结果是 public class Testmm { public static void main(String args[]) { for(char c='a';c〈=‘d’;c++) {if(c==‘c’)break; System.out.print(c); } } }A.abB.abcC.abdD.abcd
下列是一个Java应用程序,输出结果是 public class Testmm { public static void main(String args[]) { for(char c='a';c〈=‘d’;c++) {if(c==‘c’)break; System.out.print(c); } } }
A.ab
B.abc
C.abd
D.abcd
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作为Java应用程序入口的main方法,其声明格式可以是( )。A、publicstaticvoidmain(String[]args)B、publicstaticintmain(String[]args)C、publicvoidmain(String[]args)D、publicintmain(String[]args)
阅读以下说明和Java程序,填写程序中的空(1)~(6),将解答写入答题纸的对应栏内。【说明】以下Java代码实现一个简单绘图工具,绘制不同形状以及不同颜色的图形。部分接口、类及其关系如图5-1所示。【Java代码】interface?DrawCircle?{? //绘制圆形 public(1) ;}class?RedCircle?implements?DrawCircle?{? ?//绘制红色圆形???????public?void?drawCircle(int?radius,intx,?int?y)??{????????????System.out.println("Drawing?Circle[red,radius:"?+?radius?+",x:"?+?x?+?",y:"?+y+?"]");???????}}class?GreenCircle?implements?DrawCircle?{????//绘制绿色圆形??????public?void?drawCircle(int?radius,?int?x,int?y)?{???????????System.out.println("Drawing?Circle[green,radius:"?+radius+",x:?"?+x+?",y:?"?+y+?"]");??????}}abstract?class?Shape?{????//形状? protected? ? (2)???;? ? public?Shape(DrawCircle?drawCircle)?{? ?this.drawCircle=?drawCircle;? ? ? public?abstract?void?draw();}class?Circle?extends?Shape?{? //圆形? ?private?int?x,y,radius;? public?Circle(int?x,int?y,intradius,DrawCircle?drawCircle)?{? ?(3)???;? this.x?=?x;? ? ? this.y?=?y;? ?this.radius?=radius;? }? ? ?public?void?draw()?{? ? drawCircle.? ?(4)? ?;? ? ? }}public?class?DrawCircleMain?{? public?static?void?main(String[]?args)?{? Shape?redCircle=new?Circle(?100,100,10,? (5) );//绘制红色圆形? Shape?greenCircle=new?Circle(200,200,10,(6) );//绘制绿色圆形? ?redCircle.draw(); greenCircle.draw();? ?}}
main方法是Java应用程序执行的入口点,下面main方法的方法头合法的是()A.public static void main()B.public static void main(String[] args)C.public static void Main(String[] args)D.public static int main(String[] args)
6、下列()选项是Java应用程序主类中正确的main()方法。 A.static void main(String[] args)B.public void main(String[] args)C.public static void main(String args)D.public static void main(String[] args)
下列()选项是Java应用程序主类中正确的main()方法。A.public void main(String[] args)B.static void main(String[] args)C.public static void main(String args)D.public static void main(String[] args)