1 类实现cloneable接口
2 重写clone()方法
3 类变量引用类型无法复制
class dog extends pet implements cloneable{
int c;
int d;
public dog clone() {
dog clone=null;
try {
clone=(dog) super.clone();
} catch (clonenotsupportedexception e) {
e.printstacktrace();
}
return clone;
}
}
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解决idea中出现“illegal character U+200B” 问题
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Attribute ‘sklearn.linear_model._logistic.LogisticRegression.multi_class‘ must be explicitly set to
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