JAVA认证

question 14)

which of the following lines of code will compile without error

1)

int i=0;if(i) { system.out.println("hello"); }

2)

boolean b=true;boolean b2=true;if(b==b2) { system.out.println("so true"); }

3)

int i=1;int j=2;if(i==1|| j==2) system.out.println("ok");

4)

int i=1;int j=2;if(i==1 &| j==2) system.out.println("ok");

question 15)

what will be output if you try to compile and run the following code, but there is no file called hello.txt in the current directory?.

import java.io.*;public class mine { public static void main(string argv[]){ mine m=new mine(); system.out.println(m.amethod()); } public int amethod() { try { fileinputstream dis=new fileinputstream("hello.txt"); }catch (filenotfoundexception fne) { system.out.println("no such file found"); return -1; }catch(ioexception ioe) { } finally{ system.out.println("doing finally"); } return 0; }}

1) no such file found

2 no such file found ,-1

3) no such file found, doing finally, -1

4) 0

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