java - 如何确保将在构造函数中传递的两个 vector 大小相等？

Question

我实现了一个类:

public class TableInfoGroup {
  Vector<TableInfo> tableInfoVector;
  public TableInfoGroup(Vector<String> tableNameVector, Vector<String> tableTagIdVector)
  {
    if (tableNameVector.size() != tableTagIdVector.size())
      return;//I think it's not proper to do this
    tableInfoVector = new Vector<TableInfo>();
    for(int i = 0; i < tableNameVector.size(); i++)
      tableInfoVector.add(new TableInfo(tableNameVector.get(i), tableTagIdVector.get(i)));
  }
}

那优雅怎么做？抛出异常？谢谢。

Answer 1

就我个人而言，我会让该方法抛出一个 IllegalArgumentException :

Thrown to indicate that a method has been passed an illegal or inappropriate argument.

例如:

if (tableNameVector.size() != tableTagIdVector.size())
  throw new IllegalArgumentException("tableNameVector and tableTagIdVector " +
                                     "must have the same size");

尽管 IllegalAgumentException 是 unchecked exception , 我仍然会把它添加到方法的 throws clause 中作为文档。

让构造函数抛出异常将阻止对象被构造，我认为在这种情况下这是正确的做法。