单项选择题
A.get()B.set()C.compareAndSet()D.getAndDecrement()
A.newThread(Runnable r)B.startThread(Runnable r)C.setThread(Runnable r)D.executor(Runnable r)
A.getColumnLabel(int column)B.getColumnName(int column)C.getColumnType(int column)D.getColumnTypeName(int column)
A.getConnectionMetaData()B.getMetaData()C.getResultSetMetaData()D.getDatabaseMetaData()
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