Java while循环不限制作用域？

  • Z时代
  • 2024-01-10
  • 分类：问答

工作在一个侧面项目上，试图遍历一个flex表并拉取数据。该表中有一个包含另一个表的列，该表包含与其关联的行的行。我首先获取数据，然后获取与其关联的行，将其填充到程序集中，然后将其存储在数组列表中。我的问题是，它正确地提取数据，它不存储到数组列表中。它覆盖了所有以前的行，我无法弄清楚为什么。这是while循环" title="while循环">while循环的范围问题吗？我没有正确地宣布一些东西吗？代码如下Java while循环不限制作用域？

private static void submitOrder() { 
    if (nullCheck()) { 
     ArrayList<AssemblyLine> assemblyLines = new ArrayList<AssemblyLine>(); 
     HorizontalPanel hPanel = (HorizontalPanel) fTable.getWidget(fTable.getRowCount() - 1, 0); 
     CheckBox cb1 = (CheckBox) hPanel.getWidget(0); 
     int rowSpan = 0; 
     int currentRow = 1; 
     int currentAssemblyLineRow = 1; 
     while (currentRow < fTable.getRowCount() - 2) { 
      // get current info table and set initial data 
      FlexTable currentInfoTable = (FlexTable) fTable.getWidget(currentRow, 7); 
      rowSpan = fTable.getFlexCellFormatter().getRowSpan(currentRow, 7); 
      AssemblyLine al = new AssemblyLine(); 
      ListBox assembler = (ListBox) currentInfoTable.getWidget(2, 1); 
      DateBox date = (DateBox) currentInfoTable.getWidget(3, 1); 
      al.setAssemblerName(assembler.getValue(assembler.getSelectedIndex())); 
      al.setDate(date.getValue()); 
      al.setAssemblyID(Integer.parseInt(fTable.getHTML(currentRow, 0))); 
      // if "use all info for lots" is checked set assembler and date 
      // to that 
//other data set here 
      // iterate through related rows and store assemblylines in 
      // database, I think the error is in here 
      while (currentAssemblyLineRow < (rowSpan + currentRow)) { 
       al.setQuantity(Integer.parseInt(fTable.getHTML(currentAssemblyLineRow, 5))); 
       System.out.println("al.getQuantity: " + al.getQuantity()); 
       ListBox lb = (ListBox) fTable.getWidget(currentAssemblyLineRow, 6); 
       al.setPartLotNumber(lb.getItemText(lb.getSelectedIndex())); 
       System.out.println("al.getPartLotNumber: " + al.getPartLotNumber()); 
       assemblyLines.add(al); 
       System.out.println("al.tostring: " + al.toString()); 
       System.out.println("a.tostring: " + assemblyLines.get(assemblyLines.size() - 1).toString()); 
       currentAssemblyLineRow++; 
      } 
      for (int k = 0; k < assemblyLines.size(); k++) { 
       System.out.println("a.tostring: " + k + " " + assemblyLines.get(k).toString()); 
      } 
      // then iterate to next infotable 
      currentRow = currentRow + rowSpan; 
     } 
     DatabaseUtils.submitAssemblyLines(assemblyLines); 
    } else { 
     Window.alert("Oops! please fill out all boxes!"); 
    } 
}

这里是从控制台

al.getQuantity: 1 
al.getPartLotNumber: 43528 
al.tostring: AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=12, AssemblerID=0, AssemblerName=John, date=Thu Aug 01 14:54:00 PDT 2013, partLotNumber=43528, quantity=1] 
a.tostring: AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=12, AssemblerID=0, AssemblerName=John, date=Thu Aug 01 14:54:00 PDT 2013, partLotNumber=43528, quantity=1] 
al.getQuantity: 1 
al.getPartLotNumber: H17253 
al.tostring: AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=12, AssemblerID=0, AssemblerName=John, date=Thu Aug 01 14:54:00 PDT 2013, partLotNumber=H17253, quantity=1] 
a.tostring: AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=12, AssemblerID=0, AssemblerName=John, date=Thu Aug 01 14:54:00 PDT 2013, partLotNumber=H17253, quantity=1] 
al.getQuantity: 1 
al.getPartLotNumber: 31561414 
al.tostring: AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=12, AssemblerID=0, AssemblerName=John, date=Thu Aug 01 14:54:00 PDT 2013, partLotNumber=31561414, quantity=1] 
a.tostring: AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=12, AssemblerID=0, AssemblerName=John, date=Thu Aug 01 14:54:00 PDT 2013, partLotNumber=31561414, quantity=1] 
al.getQuantity: 1 
al.getPartLotNumber: 001122 
al.tostring: AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=12, AssemblerID=0, AssemblerName=John, date=Thu Aug 01 14:54:00 PDT 2013, partLotNumber=001122, quantity=1] 
a.tostring: AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=12, AssemblerID=0, AssemblerName=John, date=Thu Aug 01 14:54:00 PDT 2013, partLotNumber=001122, quantity=1] 
al.getQuantity: 2 
al.getPartLotNumber: 123456 
al.tostring: AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=12, AssemblerID=0, AssemblerName=John, date=Thu Aug 01 14:54:00 PDT 2013, partLotNumber=123456, quantity=2] 
a.tostring: AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=12, AssemblerID=0, AssemblerName=John, date=Thu Aug 01 14:54:00 PDT 2013, partLotNumber=123456, quantity=2] 
al.getQuantity: 1 
al.getPartLotNumber: 103534 
al.tostring: AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=12, AssemblerID=0, AssemblerName=John, date=Thu Aug 01 14:54:00 PDT 2013, partLotNumber=103534, quantity=1] 
a.tostring: AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=12, AssemblerID=0, AssemblerName=John, date=Thu Aug 01 14:54:00 PDT 2013, partLotNumber=103534, quantity=1] 
al.getQuantity: 1 
al.getPartLotNumber: P12345 
al.tostring: AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=12, AssemblerID=0, AssemblerName=John, date=Thu Aug 01 14:54:00 PDT 2013, partLotNumber=P12345, quantity=1] 
a.tostring: AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=12, AssemblerID=0, AssemblerName=John, date=Thu Aug 01 14:54:00 PDT 2013, partLotNumber=P12345, quantity=1] 
a.tostring: 0 AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=12, AssemblerID=0, AssemblerName=John, date=Thu Aug 01 14:54:00 PDT 2013, partLotNumber=P12345, quantity=1] 
a.tostring: 1 AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=12, AssemblerID=0, AssemblerName=John, date=Thu Aug 01 14:54:00 PDT 2013, partLotNumber=P12345, quantity=1] 
a.tostring: 2 AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=12, AssemblerID=0, AssemblerName=John, date=Thu Aug 01 14:54:00 PDT 2013, partLotNumber=P12345, quantity=1] 
a.tostring: 3 AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=12, AssemblerID=0, AssemblerName=John, date=Thu Aug 01 14:54:00 PDT 2013, partLotNumber=P12345, quantity=1] 
a.tostring: 4 AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=12, AssemblerID=0, AssemblerName=John, date=Thu Aug 01 14:54:00 PDT 2013, partLotNumber=P12345, quantity=1] 
a.tostring: 5 AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=12, AssemblerID=0, AssemblerName=John, date=Thu Aug 01 14:54:00 PDT 2013, partLotNumber=P12345, quantity=1] 
a.tostring: 6 AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=12, AssemblerID=0, AssemblerName=John, date=Thu Aug 01 14:54:00 PDT 2013, partLotNumber=P12345, quantity=1] 
al.getQuantity: 1 
al.getPartLotNumber: H17253 
al.tostring: AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=13, AssemblerID=0, AssemblerName=Blake, date=Fri Aug 02 12:00:00 PDT 2013, partLotNumber=H17253, quantity=1] 
a.tostring: AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=13, AssemblerID=0, AssemblerName=Blake, date=Fri Aug 02 12:00:00 PDT 2013, partLotNumber=H17253, quantity=1] 
al.getQuantity: 2 
al.getPartLotNumber: 001122 
al.tostring: AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=13, AssemblerID=0, AssemblerName=Blake, date=Fri Aug 02 12:00:00 PDT 2013, partLotNumber=001122, quantity=2] 
a.tostring: AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=13, AssemblerID=0, AssemblerName=Blake, date=Fri Aug 02 12:00:00 PDT 2013, partLotNumber=001122, quantity=2] 
al.getQuantity: 1 
al.getPartLotNumber: P12345 
al.tostring: AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=13, AssemblerID=0, AssemblerName=Blake, date=Fri Aug 02 12:00:00 PDT 2013, partLotNumber=P12345, quantity=1] 
a.tostring: AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=13, AssemblerID=0, AssemblerName=Blake, date=Fri Aug 02 12:00:00 PDT 2013, partLotNumber=P12345, quantity=1] 
a.tostring: 0 AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=12, AssemblerID=0, AssemblerName=John, date=Thu Aug 01 14:54:00 PDT 2013, partLotNumber=P12345, quantity=1] 
a.tostring: 1 AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=12, AssemblerID=0, AssemblerName=John, date=Thu Aug 01 14:54:00 PDT 2013, partLotNumber=P12345, quantity=1] 
a.tostring: 2 AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=12, AssemblerID=0, AssemblerName=John, date=Thu Aug 01 14:54:00 PDT 2013, partLotNumber=P12345, quantity=1] 
a.tostring: 3 AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=12, AssemblerID=0, AssemblerName=John, date=Thu Aug 01 14:54:00 PDT 2013, partLotNumber=P12345, quantity=1] 
a.tostring: 4 AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=12, AssemblerID=0, AssemblerName=John, date=Thu Aug 01 14:54:00 PDT 2013, partLotNumber=P12345, quantity=1] 
a.tostring: 5 AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=12, AssemblerID=0, AssemblerName=John, date=Thu Aug 01 14:54:00 PDT 2013, partLotNumber=P12345, quantity=1] 
a.tostring: 6 AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=12, AssemblerID=0, AssemblerName=John, date=Thu Aug 01 14:54:00 PDT 2013, partLotNumber=P12345, quantity=1] 
a.tostring: 7 AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=13, AssemblerID=0, AssemblerName=Blake, date=Fri Aug 02 12:00:00 PDT 2013, partLotNumber=P12345, quantity=1] 
a.tostring: 8 AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=13, AssemblerID=0, AssemblerName=Blake, date=Fri Aug 02 12:00:00 PDT 2013, partLotNumber=P12345, quantity=1] 
a.tostring: 9 AssemblyLine [AssemblyLineID=0, AssemblyLotNumber=0, AssemblyID=13, AssemblerID=0, AssemblerName=Blake, date=Fri Aug 02 12:00:00 PDT 2013, partLotNumber=P12345, quantity=1] 
AssemblyLot at 0: Assembly [assemblyLotNumber=1, assemblyID=12, name=null, partID=null, quantities=null] 
AssemblyLot at 1: Assembly [assemblyLotNumber=2, assemblyID=13, name=null, partID=null, quantities=null] 
AssemblyLines at 0: AssemblyLine [AssemblyLineID=7, AssemblyLotNumber=1, AssemblyID=12, AssemblerID=1, AssemblerName=John, date=Thu Aug 01 14:54:00 PDT 2013, partLotNumber=P12345, quantity=1] 
AssemblyLines at 1: AssemblyLine [AssemblyLineID=7, AssemblyLotNumber=1, AssemblyID=12, AssemblerID=1, AssemblerName=John, date=Thu Aug 01 14:54:00 PDT 2013, partLotNumber=P12345, quantity=1] 
AssemblyLines at 2: AssemblyLine [AssemblyLineID=7, AssemblyLotNumber=1, AssemblyID=12, AssemblerID=1, AssemblerName=John, date=Thu Aug 01 14:54:00 PDT 2013, partLotNumber=P12345, quantity=1] 
AssemblyLines at 3: AssemblyLine [AssemblyLineID=7, AssemblyLotNumber=1, AssemblyID=12, AssemblerID=1, AssemblerName=John, date=Thu Aug 01 14:54:00 PDT 2013, partLotNumber=P12345, quantity=1] 
AssemblyLines at 4: AssemblyLine [AssemblyLineID=7, AssemblyLotNumber=1, AssemblyID=12, AssemblerID=1, AssemblerName=John, date=Thu Aug 01 14:54:00 PDT 2013, partLotNumber=P12345, quantity=1] 
AssemblyLines at 5: AssemblyLine [AssemblyLineID=7, AssemblyLotNumber=1, AssemblyID=12, AssemblerID=1, AssemblerName=John, date=Thu Aug 01 14:54:00 PDT 2013, partLotNumber=P12345, quantity=1] 
AssemblyLines at 6: AssemblyLine [AssemblyLineID=7, AssemblyLotNumber=1, AssemblyID=12, AssemblerID=1, AssemblerName=John, date=Thu Aug 01 14:54:00 PDT 2013, partLotNumber=P12345, quantity=1] 
AssemblyLines at 7: AssemblyLine [AssemblyLineID=10, AssemblyLotNumber=2, AssemblyID=13, AssemblerID=2, AssemblerName=Blake, date=Fri Aug 02 12:00:00 PDT 2013, partLotNumber=P12345, quantity=1] 
AssemblyLines at 8: AssemblyLine [AssemblyLineID=10, AssemblyLotNumber=2, AssemblyID=13, AssemblerID=2, AssemblerName=Blake, date=Fri Aug 02 12:00:00 PDT 2013, partLotNumber=P12345, quantity=1] 
AssemblyLines at 9: AssemblyLine [AssemblyLineID=10, AssemblyLotNumber=2, AssemblyID=13, AssemblerID=2, AssemblerName=Blake, date=Fri Aug 02 12:00:00 PDT 2013, partLotNumber=P12345, quantity=1]

回答：

用户需要通过环新AssemblyLine每次分配输出。现在，你所做的只是一遍又一遍地添加同一个对象（每次通过循环修改它）。

ListBox assembler = (ListBox) currentInfoTable.getWidget(2, 1); 
DateBox date = (DateBox) currentInfoTable.getWidget(3, 1); 
while (currentAssemblyLineRow < (rowSpan + currentRow)) { 
    AssemblyLine al = new AssemblyLine(); 
    al.setAssemblerName(assembler.getValue(assembler.getSelectedIndex())); 
    al.setDate(date.getValue()); 
    al.setAssemblyID(Integer.parseInt(fTable.getHTML(currentRow, 0))); 
    // rest of loop body goes here (current code) 
}

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