东华理工大学2017java试卷_Java东华理工大学试卷A及答案.doc

Java东华理工大学试卷A及答案.doc

东华理工大学2012 —2013 学年第 1 学期考试试卷

Java程序设计 课程 闭 课程类别：考查 A

题号一二三四五六七八九总分分数评卷人1 选择题(共35分)

1.What is suffix(后缀) of Java source code？( A )?

A、 .java B、.class C、.txt D、.ext

2. Which command can compile Java source code? ( D )?

A、 edit B、 dir C、 java D、javac

3. Which identifies is illegal ( C )?

A、$_$123 B、_something C、some**name D、you_can_al

4. Which conversion (转换) is illegal ( B )?注意：byte类型的范围-128-127

A、short x=1000; B、byte x=1000; C、byte x=100; D、float x=12L;

5．class example {

public static void main(String args[]) {

boolean b;

b = (2 > 3) && (3 < 2);

System.out.print("b = "+b);

b = false || true ;

System.out.println("b = "+b); } }

What is the result?( A )

A、b=false b=true B、b=true b= false C、b=true b= true D、b= false b= false

6. class example {

public static void main(String args[]) {

int i=1;

a[i++]=a[i++]+2;

System.out.println(a[i++]);

}} What is the result?( C )

A, 4 B, 5 C 3, D,6

7．public class Example{ 　　String str=new String("good"); 　　char[]ch={'a','b','c'}; 　　public static void main(String args[]){ 　　　　Example ex=new Example(); 　　　　ex.change(ex.str,ex.ch); 　　　　System.out.print(ex.str+" and "); 　　　　Sytem.out.print(ex.ch); } 　　public void change(String str,char ch[]){ 　　　　str="test ok"; 　　　　ch[0]='g'; 　} } What is the result?( D )

A good and abc B good and gbc C test ok and abc D test ok and gbc

8. Set x=1,y=2,z=3, expression :y+=z--/++x what is result ( A )

A 3 B 3.5 C 4 D 5

9. what is result ( A )?

class example{

static int a=3;

public static void main(String args[]){

new example().a++;

new example().a+=2;

System.out.println(example.a);}}

A 6 B 7 C 4 D 5

10. 1.class X{ ( D )

2.public static void main(String args[]){

3. Stri