相关疑难解决方法(0)

为了减少可变性,我们应该使用

public void setValues(String[] newVals) {

     this.vals = ( newVals == null ? null : newVals.clone() );
}

要么

public void setValues(String[] newVals) {

     this.vals = ( newVals == null ? null : Arrays.copyOf(newVals, newVals.length) );
}