2
3
12
23
123
Compilation fails.
An exception is thrown at runtime.
第1题：
A.42
B.420
C.462
D.42042
E.Compilation fails.
F.An exception is thrown at runtime.
第2题：
System.out.println（Math.sqrt（-4D））； What is the result？（）
第3题：
A.Compilation fails.
B.ClassC is displayed.
C.The code runs with no output.
D.An exception is thrown at runtime.
第4题：
42
420
462
42042
Compilation fails.
An exception is thrown at runtime.
第5题：
r， t， t，
r， e， o，
Compilation fails.
An exception is thrown at runtime.
第6题：
public class Test{ public static void main（String[]args）{ intx=5； boolean b1=true； boolean b2=false； if（（x==4）&&!b2） System.out.print（"l"）； System.out.print（"2"）； if（（b2=true）&&b1） System.out.print（"3"）； } } What is the result？（）
第7题：
collie
harrier
Compilation fails.
collie harrier
An exception is thrown at runtime.
第8题：
A.00
B.0001
C.000120
D.00012021
E.Compilation fails.
F.An exception is thrown at runtime.
第9题：
2
3
12
23
123
Compilation fails.
An exception is thrown at runtime.
第10题：
Compilation fails.
An exception is thrown at runtime.
The code executes normally and prints "sleep".
The code executes normally， but nothing is printed.