java – 什么时候创建Enum实例？

public enum PropName {

  CONTENTS("contents"),USE_QUOTES("useQuotes"),ONKEYDOWN("onkeydown"),BROWSER_ENTIRE_TABLE("browseEntireTable"),COLUMN_HEADINGS("columnHeadings"),PAGE_SIZE("pageSize"),POPUP_TITLE("popupTitle"),FILTER_COL("filterCol"),SQL_SELECT("sqlSelect"),;

  private String name;

  private PropName(String name) {
    this.name = name;
  }

  public String getName() {
    return name;
  }
}