举一反三
- 阅读下段代码片段 public static void main(String[] args) { { int a = 1; System.out.print(a); } { int a = 2; System.out.print(a); } int a = 3; System.out.print(a); } 下列选项中,哪一个是程序正确的运行结果
- 下列程序的运行结果是()。 public class Test public static void main ( String [ ] args ) int count = 0 for( int i = 1 i < 5 i = 2) for( int j = 1 j< = 10 j = 3) count System .out .print (count ) _
- 以下程序的运行结果是:() public class Increment{ public static void main(String args[]) { int a; a = 6; System.out.print(a); System.out.print(a++); System.out.print(a); } }
- 以下程序的运行结果是:( )public class Increment{ public static void main(String[] args) { int a; a = 6; System.out.print(a); System.out.print(a++); System.out.print(a); System.out.print(--a); System.out.print(a); }} A: 66666 B: 66766 C: 67766 D: 67666
- 下列选项中,循环会无限执行的是______。 A: int i = 1 ; while ( i < 10) System .out .print( “ ” + i) ; B: for( int i = 1 ; i < 10 ;i ++) System .out .print( “ ” + i); C: for( int i = 10 ; i > 0 ;i --) System .out .print( “ ” + i); D: int i = 1 ; while (true) { System .out .print( “ ” + i); i ++ ; if ( i > 5) break ;
内容
- 0
下面的程序中,哪行会报错? public class StaticTest { int age; String name; static int totalFee = 500; public void showName() { System.out.print(this.name); } public static void showTotalFee() { line 1: System.out.print(totalFee); line 2: showName(); } public static void main(String[] args) { line3: StaticTest.showTotalFee(); } }
- 1
以下程序的运行结果是 public class test{ public static void main(String[] args) { int a; a = 6; System.out.print(a); System.out.print(a++); System.out.print(a); } } A: 666 B: 667 C: 677 D: 676
- 2
阅读下面的程序 public class Test { public static void main(String[] args) { for(int x = 0 ; x <=3 ; x++){ continue; System.out.print(x%2); } } }
- 3
现有如下程序: public static void main(String[] args){ int i=0;[br][/br] System.out.print(i++); System.out.print(i++); System.out.print(i++); System.out.print(i); int j=0; System.out.print(++j); System.out.print(++j); System.out.print(++j); System.out.print(j); } A: 01231233 B: 01230123 C: 12331233 D: 12301234
- 4
(7-13)请阅读程序,写出程序运行结果。 //运行结果题 public class Demo4 { public static int print(Object obj) { int []arr; int sum=1; if(obj instanceof int[]) { arr=(int[])obj; for(int x:arr) { sum=arr.length+sum; } } return sum; } public static void main(String[] args) { int []arr= {1,2,3,4,5}; String [] list= {"孙悟空","猪八戒","唐僧"}; System.out.println(print(arr)+print(list)); } }