Question about java Collections

Collapse
This topic is closed.
X
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • Steve High
    #1

    Question about java Collections

    Hi.
    I never worked with java's built-in collections framework, and I'm
    having a bit of trouble with it.
    I'm trying to pass a simple char data type into a
    java.util.Linke dList, and I continue to get an incompatible type
    exception (because it's expecting type Object). Is there a way I can
    cast the char or set up the list so I can avoid this? I really dont
    want to write a LinkedList class if one already exists.

    BTW, I'm using the NetBeans IDE from the Sun website, if that means
    anything.

    Thanks.
    Tags: None
    • Joe
      #2
      Re: Question about java Collections

      In article <52ce07a1.03092 61154.1bd12274@ posting.google. com>,
      schigh@comcast. net says...
      [color=blue]
      > I'm trying to pass a simple char data type into a
      > java.util.Linke dList, and I continue to get an incompatible type
      > exception (because it's expecting type Object).[/color]


      Use the Character class in the java.lang package to wrap the char
      prinmitive data before adding it the the Collection

        Comment

        • Mitch Williams
          #3
          Re: Question about java Collections

          Joe wrote:
          [color=blue]
          > In article <52ce07a1.03092 61154.1bd12274@ posting.google. com>,
          > schigh@comcast. net says...
          >
          >[color=green]
          >>I'm trying to pass a simple char data type into a
          >>java.util.Lin kedList, and I continue to get an incompatible type
          >>exception (because it's expecting type Object).[/color]
          >
          >
          >
          > Use the Character class in the java.lang package to wrap the char
          > prinmitive data before adding it the the Collection[/color]

          You should also note that when you retrieve your data from the linked,
          it will come in the form of a generic Object. You need to cast it back
          to Character in order to extract your data from it.

            Comment

            • Badhri
              #4
              Re: Question about java Collections

              Mitch Williams <codewarrior123 @cox.net> wrote in message news:<L0Ldb.766 7$Rd4.2521@fed1 read07>...[color=blue]
              > Joe wrote:
              >[color=green]
              > > In article <52ce07a1.03092 61154.1bd12274@ posting.google. com>,
              > > schigh@comcast. net says...
              > >
              > >[color=darkred]
              > >>I'm trying to pass a simple char data type into a
              > >>java.util.Lin kedList, and I continue to get an incompatible type
              > >>exception (because it's expecting type Object).[/color]
              > >
              > >
              > >
              > > Use the Character class in the java.lang package to wrap the char
              > > prinmitive data before adding it the the Collection[/color]
              >
              > You should also note that when you retrieve your data from the linked,
              > it will come in the form of a generic Object. You need to cast it back
              > to Character in order to extract your data from it.[/color]

              Nice thing is that with autoboxing facility to be introduced in JDK1.5
              such painfully redundant syntax are eliminated.

                Comment

                Previous template Next
                Working...