[java接口](%E6%8E%A5%E5%8F%A3%E7%B1%BB1.md) [java抽象類](%E6%8A%BD%E8%B1%A1%E7%B1%BB1.md) [方法重載，重寫](%E6%96%B9%E6%B3%95%E9%87%8D%E8%BD%BD%EF%BC%8C%E9%87%8D%E5%86%99.md) [繼承](%E7%BB%A7%E6%89%BF.md) [多態](%E5%A4%9A%E6%80%81.md) [向上向下轉型](%E5%90%91%E4%B8%8A%E5%90%91%E4%B8%8B%E8%BD%AC%E5%9E%8B.md) [匿名對象](%E5%8C%BF%E5%90%8D%E5%AF%B9%E8%B1%A1.md) [匿名內部類](%E5%8C%BF%E5%90%8D%E5%86%85%E9%83%A8%E7%B1%BB.md) [接口與抽象類區別](%E6%8E%A5%E5%8F%A3%E4%B8%8E%E6%8A%BD%E8%B1%A1%E7%B1%BB%E5%8C%BA%E5%88%AB.md)