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Java认证考试综合练习

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单项选择题

public static void main(String[]args){
String str="null";
if(str==null){
System.out.println("null");
}else(str.length()==0){
System.out.println("zero");
}else{
System.out.println("some");
}
}
What is the result?()

A.null
B.zero
C.some
D.Compilationfails.
E.Anexceptionisthrownatruntime.

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