【填空题】预测程序运行结果 class Person{ String name; public void setName（String name) { thi

1public class Test{ public static void main(String[ ] args) { String name[ ]=new String[5]; for(int i=0; i＜args.length; ++i) name[i] = args[i]; System.out.println(name[2]); } } 命令行中的输入为：java Test a b 程序的输出是【 】 。

阅读下面的程序，程序的运行结果是()。classStringDemo{publicstaticvoidmain(String[]args){Strings1=“a”;Strings2=“b”;show(s1,s2);System、out、println(s1+s2);}publicstaticvoidshow(Strings1,Strings2){s1=s1+”q”;s2=s2+s1;}}

A、ab

B、aqb

C、aqbaq

D、aqaqb

class Person{ String name,department; int age; public Person(Stringn){name=n;} public Person(String n, int a){name=n;age=a;} publicPerson(String n,String d,int a){ doing the same as two argumentsversion of constructer including assignment name=n,age=a } } 下列哪一个选项可以添加到“doing the same....”处?()

APerson(n,a)

Bthis(Person(n,a))

Cthis(n,a)

Dthis(name,age

以下程序的运行结果为( )。 public class Sun { public static void main(String args[]) { String x="A"，y="B"，z="C"； for(int m=1；m＜=2；m++) { x=y； y=z； z=x； } System.out.println(x+y+z)； } }

A．ABC

B．BCA

C．BCB

D．CBC

请看下面的程序段class Person {String name,department;int age;public Person(String n) { name = n; }public Person(String n,int a) { name = n; age = a; }public Person(String n,String d,int a) {（）}}下面哪一选项可以添加到（）处。

A、Person(n,a);

B、this(Person(n,a));

C、this(n,a);

D、this(name,age);

publicclassPet{privateStringname；publicPet（Stringname）{this.name=name；}publicvoidspeak（）{System.out.print（name）；}}publicclassDogextendsPet{publicDog（Stringname）{super（name）；}publicvoidspeak（）{super.speak（）；System.out.print（Dog”）；}}执行代码Petpet=newDog（京巴”）；pet.speak（）；后输出的内容是哪项？（）

A.京巴

B.京巴Dog

C.null

D.Dog京巴

【填空题】读下面程序,写出程序运行结果。 class Point{ int x; public Point(){x=0;} public Point(int x){this.x=x;} public void show(){System.out.println(x);}} class SPoint extends Point{ int y; public SPoint(){y=0;} public SPoint(int x,int y){super(x); this.y=y;} public void show(){System.out.println(x+","+y);}} public class tempDemo{ public static void main(String []args){ Point p=new Point(); p.show(); Point p1=new Point(2); p1.show(); SPoint sp=new SPoint(); sp.show(); SPoint sp1=new SPoint(2,3); sp1.show(); }} 运行结果为:

【填空题】读下面程序,写出程序运行结果。 class Father { int num1=0; public Father(){ System.out.println("num1:"+num1);} public Father(int num1){ this.num1=num1; System.out.println("num1:"+num1); } } class Son extends Father{ int num2=10; public Son(){System.out.println("num2:"+num2);} public Son(int i,int j){ super(i); num2=j; System.out.println( "num1:"+num1+",num2:"+num2); } } public class Demo{ public static void main(String []args){ Father father=new Father(); Son son=new Son(); Son son1=new Son(20,30); } } 运行结果为: