单项选择题
现有:
class Wrench f
public static void main(String [] args) {
Wrench w=new Wrench(); Wrench w2=new Wrench();
w2=go (w, w2);
System.out.print (w2==w);
}
static Wrench go (Wrench wrl, Wrench wr2) {
Wrench wr3=wrl; wrl=wr2; wr2=wr3;
return wr3;
}
结果是什么?()
A. false
B. true
C.编译失败
D.运行的时候有异常抛出
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