Ä±Ñ§Íøwww.mouxue.com
15´ºÑ§ÆÚ¡¶JAVAÓïÑÔ³ÌÐòÉè¼Æ¢ñ¡·ÔÚÏß×÷Òµ3
Ò»¡¢µ¥Ñ¡Ì⣨¹² 20 µÀÊÔÌ⣬¹² 60 ·Ö¡££©
1. ÏÂÁÐÀàÍ·¶¨ÒåÖУ¬´íÎóµÄÊÇ( )¡£ A. class x { .... }
B. public x extends y { .... }
C. public class x extends y { .... }
D. class x extends y implements y1 { .... } ÕýÈ·´ð°¸£ºB
2. ¸ø³öÏÂÁдúÂ룬ÈçºÎʹ³ÉÔ±±äÁ¿m ±»·½·¨fun£¨£©Ö±½Ó·ÃÎÊ£¿ class Test { private int m; public static void fun£¨£© { ... } } A. ½«private int m ¸ÄΪprotected int m B. ½«private int m ¸ÄΪ public int m C. ½«private int m ¸ÄΪ static int m D. ½«private int m ¸ÄΪ int m ÕýÈ·´ð°¸£ºC
3. Person, Student ºÍTeacher ¶¼ÊÇÀàÃû¡£ÕâЩÀàÓÐÒÔϼ̳йØÏµ¡£ Person | -------------------- | | Student Teacher ²¢ÇÒÔÚJavaÔ´´úÂëÖÐÓÐÈçϱí´ïʽ£º Person p = new Student(); ÈçÏÂÄĸöÓï¾äÊÇÕýÈ·µÄ£¿ A. ÕâÌõÓï¾äÊǺϷ¨µÄ B. ÕâÌõÓï¾äÊDz»ºÏ·¨µÄ C. ±àÒëʱ³ö´í
D. ±àÒëÕýÈ·µ«ÔËÐÐʱ³ö´í ÕýÈ·´ð°¸£ºA
4. ÒÑÖªÈçÏ´úÂ룺 public class Test { long a[] = new long[10]; public static void main ( String arg[] ) { System.out.println ( a[6] ); } } ÇëÎÊÄĸöÓï¾äÊÇÕýÈ·µÄ£¿ A. Êä³ö½á¹ûÊÇ null. B. Êä³ö½á¹ûÊÇ0 C. ±àÒëʱ³ö´í D. ÔËÐÐʱ³ö´í ÕýÈ·´ð°¸£ºB
5. ÏÂÁгÌÐòµÄ¹¦ÄÜÊÇÔÚ¼à¿ØÌ¨ÉÏÿ¸ôÒ»ÃëÖÓÏÔʾһ¸ö×Ö·û´®¡°Hello¡±,Äܹ»ÌîдÔÚ³ÌÐòÖÐÏ»®ÏßλÖã¬Ê¹³ÌÐòÍêÕû²¢ÄÜÕýÈ·ÔËÐеÄÓï¾äÊÇ public class Test implements Runnable{ public static void main(String args[]){ Test t=new Test(); Thread tt=new Thread(t); tt.start(); } public void run(){ for(;;){ try{ A. sleep(1000) InterruptedException B. sleep(1000) RuntimeException
C. Thread.sleep(1000) RuntimeException
Ä±Ñ§Íøwww.mouxue.com
D. Thread.sleep(1000) InterruptedException ÕýÈ·´ð°¸£ºD
6. ÏÂÃæ³ÌÐòÔËÐкóIµÄ½á¹ûÊÇʲô£¿ Class sree { fun(){ static int I =0; I++; } public static void main(String args[]) { sree obj=new sree(); obj.fun(); obj.fun(); } A. ±àÒë´íÎó B. ÔËÐÐʱ´íÎó C. 1 D. 2
ÕýÈ·´ð°¸£ºA
7. ÒÑÖªÈçϵÄÃüÁîÖ´ÐÐ java MyTest a b c ÇëÎÊÄĸöÓï¾äÊÇÕýÈ·µÄ£¿ A. args[0] = \B. args[0] = \C. args[0] = \D. args[1]= 'b' ÕýÈ·´ð°¸£ºC
8. ÇëÑ¡ÔñÒÔÏ´úÂëµÄÕýÈ·µÄÖØÔØ¹¹ÔìÆ÷¡£ class Happy { Happy() { } } A. public void Happy(){} B. public Happy(int c){} C. protected Happy(){} D. void Happy(){} ÕýÈ·´ð°¸£ºB 9. ÔÚoneMethod£¨£©·½·¨ÔËÐÐÕý³£µÄÇé¿öÏ£¬³ÌÐò¶Î½«Êä³öʲô? public void test£¨£© { try { oneMethod£¨£©; System.out.println£¨\1\£©; } catch £¨ArrayIndexOutOfBoundsException e£© { System.out.println£¨\2\£©; } catch£¨Exception e£© { System.out.println£¨\£©; A. condition 1 B. condition 2 C. condition 3
D. condition 1 finally ÕýÈ·´ð°¸£ºD
10. ÔĶÁÏÂÁдúÂëºó public class Person{ int arr[]=new int[10]; public static void main(String args[]){ System.out.println(arr[1]); } } ÕýÈ·µÄ˵·¨ÊÇ A. ±àÒëʱ½«²úÉú´íÎó
B. ±àÒëʱÕýÈ·£¬ÔËÐÐʱ½«²úÉú´íÎó C. Êä³öÁã D. Êä³ö¿Õ ÕýÈ·´ð°¸£ºC
11. ÏÂÁÐÓï¾äÐòÁÐÖ´Ðкó£¬j µÄÖµÊÇ( )¡£ Int j=3, i=2; while( --i!=i/j ) j=j+2; A. 2 B. 4 C. 5 D. 6
ÕýÈ·´ð°¸£ºC
Ä±Ñ§Íøwww.mouxue.com
12. ÒÑÖª±í´ïʽint m[] = {0, 1, 2, 3, 4, 5, 6 }; ÏÂÃæÄĸö±í´ïʽµÄÖµÓëÊý×éϱêÁ¿×ÜÊýÏàµÈ£¿ A. m.length() B. m.length C. m.length()+1 D. m.length+1 ÕýÈ·´ð°¸£ºB
13. ¸ø³öÏÂÃæµÄ½Ó¿Ú£º interface A{ int method1(int i); int method2(int j); } ÏÂÃæÄǸöÀàʵÏÖÁËÕâ¸ö½Ó¿Ú£¬²¢ÇÒ²»ÊdzéÏóµÄ£¿
A. class B implements A{ int method1(){} int method2(){} } B. class B { int method1(int i){} int method2(int j){} }
C. class B implements A{ int method1(int i){} int method2(int j){} } D. class B extends A{ int method1(int i){} int method2(int j){} } ÕýÈ·´ð°¸£ºC
14. ÉèÓÐÏÂÃæµÄÁ½¸öÀඨÒ壺 class AA { void Show(){ System.out.println(\ÎÒϲ»¶Java!\ÎÒϲ»¶C++!\Ôò˳ÐòÖ´ÐÐÈçÏÂÓï¾äºóÊä³ö½á¹ûΪ£º£¨ £© AA a; BB b; a.Show(); b.Show(); A. ÎÒϲ»¶Java! ÎÒϲ»¶C++! B. ÎÒϲ»¶C++! ÎÒϲ»¶Java! C. ÎÒϲ»¶Java! ÎÒϲ»¶Java! D. ÎÒϲ»¶C++! ÎÒϲ»¶C++! ÕýÈ·´ð°¸£ºA
15. Èç¹ûÄãÒª¶ÁÒ»¸ö²ÎÊýÖµ£¬¶ø¸Ã²ÎÊýÔÚ
C. ²ÎÊýÖµÊǸö¿Õ×Ö·û´® D.
ÕýÈ·´ð°¸£ºB
16. ÒÑÖªÈçÏ´úÂ룺 boolean m = true; if ( m = false ) System.out.println(\else System.out.println(\Ö´Ðнá¹ûÊÇʲô£¿ A. False B. True
C. ±àÒëʱ³ö´í D. ÔËÐÐʱ³ö´í ÕýÈ·´ð°¸£ºB
17. ÏÂÁÐÄĸöÑ¡ÏîµÄjavaÔ´Îļþ´úÂëÆ¬¶ÎÊDz»ÕýÈ·µÄ£¿ A. package testpackage; public class Test{ }
B. import java.io.*; package testpackage; public class Test{ } C. import java.io.*; class Person{ } public class Test{ } D. import java.io.*; import java.awt.*; public class Test{ } ÕýÈ·´ð°¸£ºB
18. ¸ø¶¨ÏÂÃæµÄÀࣺ public class Example{ String str=new String(¡°good¡±); char ch[]={'a','b','c'}; public static void main(String args[]){ Example
Ä±Ñ§Íøwww.mouxue.com
ex=new Example(); ex.change(ex.str,ex.ch); System.out.println(ex.str+¡±and¡±+ex.ch); } public void A. good and abc B. good and gbc C. test ok and abc D. test ok and gbc ÕýÈ·´ð°¸£ºB
19. ÏÂÃæ³ÌÐòµÄÊä³ö½á¹ûÊÇʲô£¿ class C1{ static int j=0; public void method(int a){ j++; } } class Test extends C1{ public int method(){ return j++; } public void result(){ method(j); System.out.println(j+method()); } public static void main(String args[]){ new Te A. 0 B. 1 C. 2 D. 3
ÕýÈ·´ð°¸£ºC
20. ÏÂÃæµÄ´úÂë¶ÎÖУ¬Ö´ÐÐÖ®ºói ºÍj µÄÖµÊÇʲô? int i = 1; int j; j = i++; A. 1, 1 B. 1, 2 C. 2, 1 D. 2, 2 ÕýÈ·´ð°¸£ºC
15´ºÑ§ÆÚ¡¶JAVAÓïÑÔ³ÌÐòÉè¼Æ¢ñ¡·ÔÚÏß×÷Òµ3
¶þ¡¢¶àÑ¡Ì⣨¹² 10 µÀÊÔÌ⣬¹² 40 ·Ö¡££©
1. String s=¡±Example String¡±; ÏÂÃæÄÄЩÓï¾äÊÇÕýÈ·µÄ£¿ A. s>>>=3;
B. int i=s.length(); C. s[3]=¡±x¡±;
D. String short_s=s.trim(); E. String t=¡±root¡±+s; ÕýÈ·´ð°¸£ºBDE
2. ÒÑÖªÈç϶¨Ò壺 String s = \ÏÂÃæÄÄЩ±í´ïʽÊǺϷ¨µÄ£¿ A. s += \
Ä±Ñ§Íøwww.mouxue.com
B. char c = s[1];
C. int len = s.length;
D. String t = s.toLowerCase(); ÕýÈ·´ð°¸£ºAD
3. Ñ¡ÔñËùÓÐÓÐЧµÄ¹¹Ô캯Êý¡£ class Happy { } } A. public void Happy(){} B. public Happy(int c){} C. protected Happy(){} D. public int Happy(){} E. void Happy(){} ÕýÈ·´ð°¸£ºBC
4. ÒÑÖªÈçÏ´úÂ룺 public class Test { public static void main(String arg[]) { int i = 5; do { System.out.println(i); } while (--i>5) System.out.println(\} } Ö´ÐкóµÄÊä³ö½á¹û°üÀ¨Ê²Ã´£¿ A. 5 B. 4 C. 6
D. finished E. ʲô¶¼²»Êä³ö ÕýÈ·´ð°¸£ºAD
5. ¼Ù¶¨ÎļþÃûÊÇ¡°Fred.java¡±£¬ÏÂÃæÄĸöÊÇÕýÈ·µÄÀàÉùÃ÷¡£
A. public class Fred{ public int x = 0; public Fred (int x){ this.x=x; } }
B. public class fred{ public int x = 0; public Fred (int x){ this.x=x; } }
C. public class Fred extends MyBaseClass{ public int x = 0; } ÕýÈ·´ð°¸£ºAC
6. ÇëÑ¡³ö´´½¨Êý×éµÄÕýÈ·Óï¾ä¡£ A. float f[][] = new float[6][6]; B. float []f[] = new float[6][6]; C. float f[][] = new float[][6]; D. float [][]f = new float[6][6]; ÕýÈ·´ð°¸£ºABD
7. ¸ø³öÏÂÃæµÄ´úÂë¶Î: public class Base{ int w, x, y ,z; public Base(int a,int b) { x=a; y=b; } public Base(int a, int b, int c, int d) { //¸³Öµ x=a, y=b w=d; z=c; } } ÔÚ´úÂë˵Ã÷//¸³Öµ x=a, y=b´¦Ð´ÈëÈçÏÂÄļ¸ÐдúÂëÊÇÕýÈ·µÄ£¿ A. Base(a,b) B. x=a,y=b; C. x=a;y=b; D. this(a,b); ÕýÈ·´ð°¸£ºCD
8. Èç¹ûÓÐÒÔÏ´úÂ룬ÄöÊý×ÖÄܲúÉúÊä³ö \µÄ½á¹û? Switch(x){ case 1: System.out.println(\