[問題] 關於ArrayList compile的問題??

看板java作者r1239386 (T毛毛)時間18年前 (2008/04/05 18:00)推噓2(2推 0噓 2→)

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我再compile arraylist的程式的時候書上叫我用javac -Xlint:unchecked -nowarn TestArrayList.java 不過compile之後出現以下這個 ---------------------------------------------------------------- D:\java>javac -Xlint:checked -nowarn TestArrayList.java TestArrayList.java:52: cannot find symbol symbol : class Circle location: class TestArrayList list.add(new Circle(2)); ^ TestArrayList.java:53: cannot find symbol symbol : class Circle location: class TestArrayList list.add(new Circle(3)); ^ TestArrayList.java:57: cannot find symbol symbol : class Circle location: class TestArrayList ((Circle)list.get(0)).getArea()); ^ Note: TestArrayList.java uses unchecked or unsafe operations. Note: Recompile with -Xlint:unchecked for details. 3 errors ------------------------------------------------------------------ class檔也沒有跑出來... 可以請教一下這是怎麼一回事嗎?? (這個是書上給的code 並不是我自己寫的...所以應該沒有錯) 我把circle.class後再compile一次變成 ------------------------------------------------------------------- D:\java>javac -Xlint:checked -nowarn TestArrayList.java TestArrayList.java:52: cannot access Circle bad class file: .\Circle.java file does not contain class Circle Please remove or make sure it appears in the correct subdirectory of the classpa th. list.add(new Circle(2)); ^ Note: TestArrayList.java uses unchecked or unsafe operations. Note: Recompile with -Xlint:unchecked for details. 1 error -------------------------------------------------------------------- -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 218.174.37.158

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qrtt1

04/05 18:01, , 1^F

04/05 18:01, 1^F

※ 編輯: r1239386 來自: 218.174.37.158 (04/05 18:10)

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r1239386

04/05 18:12, , 2^F

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r1239386

04/05 18:15, , 3^F