问题描述

Java的GroupLayout问题，设置组件的问题 30C

代码显示没有错误，但是运行的时候老是在控制台显示错误，错误提示如下《：Exception in thread ""AWT-EventQueue-0"" java.lang.IllegalStateException: javax.swing.JLabel[000x0invalidalignmentX=0.0alignmentY=0.0border=flags=8388608maximumSize=minimumSize=preferredSize=defaultIcon=disabledIcon=horizontalAlignment=LEADINGhorizontalTextPosition=TRAILINGiconTextGap=4labelFor=text=账号登录名：verticalAlignment=CENTERverticalTextPosition=CENTER] is not attached to a vertical group》
当然这个是我认为比较有依据的一句话

源代码如下：
public class AddAccount extends JPanel{

/** *  */private static final long serialVersionUID = 1L;//public static AddAccount addAccount;   JLabel lblIdlblLoginNamelblPasswordlblRealNamelblType;//设置地址，登录名，登录密码，真实姓名，    JLabel lblIdMesslblNameMesslblPassMesslblRealMess;//    JTextField txtIdtxtNametxtRealName;    JPasswordField txtPassword;    JComboBox cboType;    JButton btnOkbtnReset;public AddAccount(){    initComponent();}public void initComponent(){    this.setPreferredSize(new Dimension(6000));//设置初始大小    lblId=new JLabel(""账号编号："");    lblLoginName=new JLabel(""账号登录名："");    lblPassword=new JLabel("" 登录密码 ："");    lblRealName=new JLabel("" 真实姓名 ："");    lblType=new JLabel("" 账号类型 ："");    //设置JLabel    txtId=new JTextField();    txtName=new JTextField();    txtRealName=new JTextField();    //设置JTextField（）方法    txtPassword=new JPasswordField();     String [] items =new String[]{""管理员""业务员""操作员""};//创建账号类型     cboType = new JComboBox(items);     btnOk=new JButton(""确定"");     btnReset=new JButton(""重置"");     lblIdMess=new JLabel(""编号由系统生成，不用修改"");     lblNameMess=new JLabel(""账号长度在5到20位之间"");     lblPassMess=new JLabel(""密码长度必须在5到20位之间"");     lblRealMess=new JLabel(""姓名长度必须在1到20位之间"");     //F/GroupLayout创建文本框的横竖位置     GroupLayout group=new GroupLayout(this);     GroupLayout.SequentialGroup hgroup=group.createSequentialGroup();     hgroup.addGroup(group.createParallelGroup(Alignment.LEADING)             .addComponent(lblIdGroupLayout.PREFERRED_SIZE100GroupLayout.PREFERRED_SIZE)             .addComponent(lblLoginNameGroupLayout.PREFERRED_SIZE100GroupLayout.PREFERRED_SIZE)//登录账号             .addComponent(lblPassword)//登录密码             .addComponent(lblRealName)//真实姓名             .addComponent(lblType)             );     hgroup.addGroup(group.createParallelGroup(Alignment.CENTER)//             .addComponent(txtIdGroupLayout.PREFERRED_SIZE100GroupLayout.PREFERRED_SIZE)             .addComponent(txtName)             .addComponent(txtPassword)             .addComponent(txtRealName)             .addComponent(cboType)             .addGroup(group.createParallelGroup())             .addComponent(btnOk)             .addComponent(btnReset)             );     hgroup.addGroup(group.createSequentialGroup()             .addComponent(lblIdMess)             .addComponent(lblNameMess)             .addComponent(lblPassMess)             .addComponent(lblRealMess));     //     GroupLayout.SequentialGroup vgroup=group.createSequentialGroup();     vgroup.addGroup(group.createParallelGroup(Alignment.CENTER)             .addComponent(lblId)             .addComponent(txtId)             .addComponent(lblIdMess)             );     vgroup.addGroup(group.createParallelGroup(Alignment.CENTER)             .addComponent(lblLoginName)             .addComponent(txtName)             .addComponent(lblNameMess)             );     vgroup.addGroup(group.createParallelGroup(Alignment.CENTER)             .addComponent(lblPassword)             .addComponent(txtPassword)             .addComponent(lblPassMess)             );     vgroup.addGroup(group.createParallelGroup(Alignment.CENTER)             .addComponent(lblRealName)             .addComponent(txtRealName)            // .addComponent(lblRealMess)             );     vgroup.addGroup(group.createParallelGroup(Alignment.CENTER)             .addComponent(lblType)             .addComponent(cboType)             );     vgroup.addGroup(group.createParallelGroup(Alignment.CENTER)             .addComponent(btnOk)             .addComponent(btnReset)             );     group.setHorizontalGroup(hgroup);     group.setVerticalGroup(hgroup);     this.setLayout(group);     }

解决方案

希望 各位帮帮忙，这种情况出现好几次了，我总是找不到解决的办法，拜托拜托

解决方案二：
group.setVerticalGroup(hgroup); 改成 group.setVerticalGroup(vgroup);

解决方案三：
Android中的RelativeLayout中组件的排放问题