考题
下列代码的执行结果是______。public class Test{public static void main(String[]args){int[]x={0, 1, 2, 3};for(int i=0;i<3;i+=2){try{System.out println(x[i+23/x[i]+x[i+1]);}catch(ArithmeticException e){System.out.println("error1");}catch (Exception e){System.out.println("error2");}}}}A) error1B) error2C) error1D) 2error2 error2A.B.C.D.
考题
假设变量x的值为25,要输出x的值,以下正确的语句是()。
A、System.Console.WriteLine(“x”)B、System.Console.WriteLine(“x”)C、System.Console.WriteLine(“x={0}”,x)D、System.Console.WriteLine(“x={x}”)
考题
publicclassBar{11.staticvoidfoo(int...x){12.//insertcodehere13.}14.}Which two code fragments,inserted independently at line1 2,will allow the class to compile()
A.foreach(x)System.out.println(z);B.for(intz:x)System.out.println(z);C.while(x.hasNext())System.out.println(x.next());D.for(inti=0;i
考题
java中i与i是什么意思
inti=3;intcount=(i++)+(i++)+(i++);System.out.println(i);System.out.println(count);intj=3;count=(++j)+(++j)+(++j);System.out.println(j);System.out.println(count);在这个式子里面为什么i的值与j的值相等?
考题
Whatshouldanadministratordotosetuparequiredroleforauseridthatwillallowittostart/stopWPARsontheserver?()
A.OnthedesiredWPAR:mkroleauthorizations=aix.wpar.systemnewRolesetkst-trolechuser roles=newRoledefault_roles=newRoleuser1B.Ontheglobalenvironment:mkroleauthorizations=aix.wpar.systemnewRolesetkst-trole chuserroles=newRoledefault_roles=newRoleuser1C.OnthedesiredWPAR:Editthe/etc/security/authorizationsfileadding:‘newRoleauthorizations=aix.wpar.system’setkst-trolechuserroles=newRoledefault_roles=newRoleuser1D.Ontheglobalenvironment:Editthe/etc/security/authorizationsfileadding:‘newRoleauthorizations=aix.wpar.system’setkst-trolechuserroles=newRoledefault_roles=newRoleuser1
考题
下列程序使用系统标准输入System.in从键盘获得输入字符串,请选择正确的一项填入下列程序的横线处。 import java.io.*; public class ex26 { public static void main(String args[]) { byte buffer[] = new byte[128]; int n; try { n = for(int i = 0; i < n; i++) System.out .print ( (char)buffer [i] ); catch (IOException e) { System.out.print (e); } } }A.System.in.read(buffer)B.system.in.read(buffer)C.System.in.read0D.System.in(buffer)
考题
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 ;
考题
【分录题】写出以下程序运行结果。 public class Demo7 { public static void main(String[] args) { int i=1,j=0; int x=2; while(x<13) { for(;;) { if(i*j>10) break; i++; j++; } x=x+2; } System.out.println(x); System.out.println(i); System.out.println(j); } }
考题
【多选题】(4-3)初始了如下二维数组,()能够遍历该二维数组。 int [ ][ ] arr={{3,4,5},{7,8,2},{1},{6,2,8}};A.for(int i=0;i<arr.length;i++) for(int j=0;j<arr.length;j++) System.out.println(arr[i][j]);B.for(int i=0;i<arr.length;i++) for(int j=0;j<arr[i].length;j++) System.out.println(arr[i][j]);C.for(int i=0;i<arr.length;i++) for(int x:arr[i]) System.out.println(x);D.for(int list:arr) for(int x:list) System.out.println(x);E.for(int[ ] list:arr) for(int x:list) System.out.println(x);
考题
假设变量x的值为25,要输出x的值,以下正确的语句是()。A.System.Console.WriteLine(“x”)B.System.Console.WriteLine(x)C.System.Console.WriteLine(“x={0}”,x)D.System.Console.WriteLine(“x={x}”)