为什么运行后就提示这样的错误：Exception in thread "main" java.lang.Error: Unresolved compilation problem:

ppllxx123123ppllxx 2008-06-02 10:20:57
为什么运行后就提示这样的错误：Exception in thread "main" java.lang.Error: Unresolved compilation problem:
Syntax error on token(s), misplaced construct(s)

at dljm.main.Departmentmanage.<init>(Departmentmanage.java:216)
at dljm.main.Departmentmanage.main(Departmentmanage.java:296)
216行代码是这样的：public static boolean joinDB();
295，296行代码是这样的：Departmentmanage dm = new Departmentmanage();
dm.show(); {
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ppllxx123123ppllxx 2008-06-02
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7楼的朋友 为什么还是不能运行啊 我做的绩效考核系统 这是其中的部门管理
zwgs1985 2008-06-02
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btdelet.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
try {
String sql =
"delete from DepartmentInformation where D_Number ='"
+ tnumber.getText()
+ "'";
System.out.println(sql);
if (Database.executeSQL(sql)) {
new JOptionPane().showMessageDialog(null, "数据删除成功！");
Database.joinDB();
String sqll = "select * from DepartmentInformation";
Database.query(sqll);
Database.rs.last();
String number1 = ("" + Database.rs.getInt("D_Number"));

String name1 = Database.rs.getString("D_Name");
String count1 = Database.rs.getString("D_Count");
tnumber.setText(number1);
tname.setText(name1);
tcount.setText(count1);
}
} catch (Exception el) {
}
}
});

btamend.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
try {
String supdate =
"update DepartmentInformation set D_Name='"
+ tname.getText()
+ "',D_count='"
+ tcount.getText()
+ "' where D_Number='"
+ tnumber.getText()
+ "'";

if (Database.executeSQL(supdate)) {
new JOptionPane().showMessageDialog(null, "数据修改成功！");
Database.joinDB();
String sqll = "select * from bmenInfo";
Database.query(sqll);
Database.rs.last();
String number1 = ("" + Database.rs.getInt("D_Number"));

String name1 = Database.rs.getString("D_Name");
String count1 = Database.rs.getString("D_Count");
tnumber.setText(number1);
tname.setText(name1);
tcount.setText(count1);
}
} catch (Exception es) {
}
}
});
// -----------------------------------------------------------------
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
setVisible(true);

}

public static void main(String[] args) {

Departmentmanage dm = new Departmentmanage();
dm.show();
}

static class Database {
public static Connection cn;

public static Statement st;

public static ResultSet rs;

public static boolean joinDB() {
boolean joinFlag;
try {
joinFlag = true;
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
cn = DriverManager.getConnection("jdbc:odbc:EmployeeInformationMS", "sa", "123456");

cn.setCatalog("rm");
System.out.println("数据库连接成功");
st =
cn.createStatement(
ResultSet.TYPE_SCROLL_SENSITIVE,
ResultSet.CONCUR_READ_ONLY);
return joinFlag;

} catch (SQLException sqlEx) {
System.out.println(sqlEx.getMessage());

joinFlag = false;
return joinFlag;

} catch (ClassNotFoundException notfoundEX) {
System.out.println(notfoundEX.getMessage());

joinFlag = false;
return joinFlag;
}
}

public static boolean executeSQL(String sqlString) {
boolean executeFlag;
try {
st.execute(sqlString);
executeFlag = true;
} catch (Exception e) {
executeFlag = false;
System.out.println("sql exception:" + e.getMessage());
}
return executeFlag;
}

public static boolean query(String sqlString) {

try {
rs = null;
// System.out.println(sqlString);
rs = st.executeQuery(sqlString);
} catch (Exception Ex) {
System.out.println("sql exception:" + Ex);
return false;
}
return true;
}
}
}
zwgs1985 2008-06-02
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改了一下，能运行了，其他的再测测吧，不知道你考代码还是什么其他原因，编译都不通过
-----------------------------------------------------------------
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.sql.*;

public class Departmentmanage extends JFrame {

JLabel lb1 = new JLabel("部门名称");

JLabel lb2 = new JLabel("部门_ID");

JLabel lb3 = new JLabel("部门_负责人");

JLabel lb4 = new JLabel("部门_负责人_ID");

JLabel lb5 = new JLabel("部门_负责人_权限");

JTextField tnumber = new JTextField();

JTextField tname = new JTextField();

JTextField tcount = new JTextField();

JButton btright = new JButton(" < <");

JButton btleft = new JButton(">>");

JButton btdelet = new JButton("删除");

JButton btamend = new JButton("修改");

JButton btsave = new JButton("保存");

JButton btadd = new JButton("添加");

public Departmentmanage() {

setTitle("部门信息管理");
btsave.setEnabled(false);

getContentPane().setLayout(null);
Font f = new Font("新宋体", 0, 14);
btleft.setFont(f);

lb1.setFont(new java.awt.Font("新宋体", 1, 18));
lb1.setForeground(new Color(0, 51, 255));
getContentPane().add(lb1);
lb1.setBounds(110, 20, 160, 30);

lb2.setFont(f);
getContentPane().add(lb2);
lb2.setBounds(40, 85, 70, 20);
lb3.setFont(f);
getContentPane().add(lb3);
lb3.setBounds(40, 125, 70, 20);
lb4.setFont(f);
getContentPane().add(lb4);
lb4.setBounds(40, 165, 70, 20);
lb5.setFont(f);
getContentPane().add(lb5);
lb5.setBounds(40, 205, 70, 20);

getContentPane().add(tnumber);
tnumber.setBounds(155, 85, 100, 23);
getContentPane().add(tname);
tname.setBounds(155, 125, 120, 23);
getContentPane().add(tcount);
tcount.setBounds(155, 165, 120, 23);

btright.setFont(f);
getContentPane().add(btright);
btright.setBounds(330, 250, 50, 20);

btleft.setFont(f);
getContentPane().add(btleft);
btleft.setBounds(330, 230, 50, 20);

btdelet.setFont(f);
getContentPane().add(btdelet);
btdelet.setBounds(250, 240, 70, 25);

btamend.setFont(f);
getContentPane().add(btamend);
btamend.setBounds(170, 240, 70, 25);

btsave.setFont(f);
getContentPane().add(btsave);
btsave.setBounds(10, 240, 70, 25);

btadd.setFont(f);
getContentPane().add(btadd);
btadd.setBounds(90, 240, 70, 25);
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
setBounds((screenSize.width - 403) / 2, (screenSize.height - 329) / 2, 403, 329);

// -------------------------------------------------------------------

// 为左右按钮加事件--------------------------------------------------
btright.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
try {
if (Database.rs.previous()) {
String number = ("" + Database.rs.getInt("D_Number"));

String name = Database.rs.getString("D_Name");
String count = Database.rs.getString("D_Count");
tnumber.setEditable(true);
tnumber.setText(number);
tname.setText(name);
tcount.setText(count);
}
} catch (Exception el) {
System.out.println(el);
}
}
});

btleft.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
try {
if (Database.rs.next()) {
String number = ("" + Database.rs.getInt("D_Number"));

String name = Database.rs.getString("D_Name");
String count = Database.rs.getString("D_Count");
tnumber.setEditable(true);
tnumber.setText(number);
tname.setText(name);
tcount.setText(count);
}
} catch (Exception er) {
System.out.println(er);
}
}
});

// -----------------------------------------------------------------

// 为添加删除保存修改按钮加事件----------------------------------------
btadd.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
btsave.setEnabled(true);
tnumber.setText("");
tnumber.setEditable(false);
tname.setText("");
tcount.setText("");
}
});
btsave.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (tname.getText().equals("") || tcount.getText().equals("")) {
new JOptionPane().showMessageDialog(null, "部门名和部门人数都不能为空！");
} else {
String name = tname.getText();
String count = tcount.getText();
String sInsert =
"insert DepartmentInformation values('" + name + "','" + count + "')";
try {
if (Database.executeSQL(sInsert)) {
tnumber.setEditable(true);
btsave.setEnabled(false);
new JOptionPane().showMessageDialog(null, "添加数据成功！");
// public static boolean joinDB();
// {
// boolean joinFlag;
// }
String sql = "select * from bmenInfo";
Database.query(sql);
Database.rs.last();
String number1 = ("" + Database.rs.getInt("D_Number"));
String name1 = Database.rs.getString("D_Name");
String count1 = Database.rs.getString("D_Count");
tnumber.setText(number1);
tname.setText(name1);
tcount.setText(count1);
}

else {
new JOptionPane().showMessageDialog(null, "添加数据不成功！");
}
} catch (Exception ei) {
new JOptionPane().showMessageDialog(null, "添加数据不成功！");
}
}
}
});

wjh0205 2008-06-02
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jdbc:odbc:EmployeeInformationMS这个是你的url还是什么？
zwgs1985 2008-06-02
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哥们，你的代码能编译吗？
我怎么编译都不过
public static boolean joinDB();
{
boolean joinFlag;
}
这个是什么东西？
干什么用的？
是谁的方法阿？
没看懂
ppllxx123123ppllxx 2008-06-02
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//连接数据库-------
class Database {
public static Connection cn;
public static Statement st;
public static ResultSet rs;
public boolean joinDB() {
boolean joinFlag;
try {
joinFlag = true;
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
cn = DriverManager.getConnection("jdbc:odbc:EmployeeInformationMS","sa","123456");

cn.setCatalog("rm");
System.out.println("数据库连接成功");
st = cn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,
ResultSet.CONCUR_READ_ONLY);
return joinFlag;

} catch (SQLException sqlEx) {
System.out.println(sqlEx.getMessage());

joinFlag = false;
return joinFlag;

} catch (ClassNotFoundException notfoundEX) {
System.out.println(notfoundEX.getMessage());

joinFlag = false;
return joinFlag;
}
}

public boolean executeSQL(String sqlString) {
boolean executeFlag;
try {
st.execute(sqlString);
executeFlag = true;
} catch (Exception e) {
executeFlag = false;
System.out.println("sql exception:" + e.getMessage());
}
return executeFlag;
}


public boolean query(String sqlString) {

try {
rs = null;
//System.out.println(sqlString);
rs = st.executeQuery(sqlString);
} catch (Exception Ex) {
System.out.println("sql exception:" + Ex);
return false;
}
return true;
}
}

//-------------------------------------------------------------------

//为左右按钮加事件--------------------------------------------------
btright.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
try{
if(Database.rs.previous()){
String number=("" + Database.rs.getInt("D_Number"));

String name=Database.rs.getString("D_Name");
String count=Database.rs.getString("D_Count");
tnumber.setEditable(true);
tnumber.setText(number);
tname.setText(name);
tcount.setText(count);
}
}
catch(Exception el){
System.out.println(el);
}
}
});


btleft.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
try{
if(Database.rs.next()){
String number=("" + Database.rs.getInt("D_Number"));

String name=Database.rs.getString("D_Name");
String count=Database.rs.getString("D_Count");
tnumber.setEditable(true);
tnumber.setText(number);
tname.setText(name);
tcount.setText(count);
}
}
catch(Exception er){
System.out.println(er);
}
}
});


//-----------------------------------------------------------------


//为添加删除保存修改按钮加事件----------------------------------------
btadd.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
btsave.setEnabled(true);
tnumber.setText("");
tnumber.setEditable(false);
tname.setText("");
tcount.setText("");
}
});
btsave.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
if(tname.getText().equals("") || tcount.getText().equals("")){
new JOptionPane().showMessageDialog(null,"部门名和部门人数都不能为空！");
}
else{
String name=tname.getText();
String count=tcount.getText();
String sInsert = "insert DepartmentInformation values('"+ name +"','"+ count +"')";
try{
if(Database.executeSQL(sInsert)){
tnumber.setEditable(true);
btsave.setEnabled(false);
new JOptionPane().showMessageDialog(null,"添加数据成功！");
public static boolean joinDB();
{
boolean joinFlag;
}
String sql="select * from bmenInfo";
Database.query(sql);
Database.rs.last();
String number1=("" + Database.rs.getInt("D_Number"));
String name1=Database.rs.getString("D_Name");
String count1=Database.rs.getString("D_Count");
tnumber.setText(number1);
tname.setText(name1);
tcount.setText(count1);
}

else{
new JOptionPane().showMessageDialog(null,"添加数据不成功！");
}
}
catch(Exception ei){
new JOptionPane().showMessageDialog(null,"添加数据不成功！");
}
}
}
});

btdelet.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
try{
String sql="delete from DepartmentInformation where D_Number ='"+ tnumber.getText()+"'";
System.out.println(sql);
if(Database.executeSQL(sql)){
new JOptionPane().showMessageDialog(null,"数据删除成功！");
Database.joinDB();
String sqll="select * from DepartmentInformation";
Database.query(sqll);
Database.rs.last();
String number1=("" + Database.rs.getInt("D_Number"));

String name1=Database.rs.getString("D_Name");
String count1=Database.rs.getString("D_Count");
tnumber.setText(number1);
tname.setText(name1);
tcount.setText(count1);
}
}
catch(Exception el){}
}
});

btamend.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
try{
String supdate="update DepartmentInformation set D_Name='"+ tname.getText() +"',D_count='"+ tcount.getText()+"' where D_Number='"+ tnumber.getText()+"'";

if(Database.executeSQL(supdate)){
new JOptionPane().showMessageDialog(null,"数据修改成功！");
Database.joinDB();
String sqll="select * from bmenInfo";
Database.query(sqll);
Database.rs.last();
String number1=("" + Database.rs.getInt("D_Number"));

String name1=Database.rs.getString("D_Name");
String count1=Database.rs.getString("D_Count");
tnumber.setText(number1);
tname.setText(name1);
tcount.setText(count1);
}
}
catch(Exception es){}
}
});
//-----------------------------------------------------------------
this.setClosable(true);
setVisible(true);

}
public static void main(String[] args){

Departmentmanage dm = new Departmentmanage();
dm.show();
}
}
ppllxx123123ppllxx 2008-06-02
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因为代码太长分开了发
package dljm.main;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.sql.*;

public class Departmentmanage extends JFrame{

JLabel lb1 = new JLabel("部门名称");
JLabel lb2 = new JLabel("部门_ID");
JLabel lb3 = new JLabel("部门_负责人");
JLabel lb4 = new JLabel("部门_负责人_ID");
JLabel lb5= new JLabel("部门_负责人_权限");
JTextField tnumber = new JTextField();
JTextField tname = new JTextField();
JTextField tcount = new JTextField();
JButton btright = new JButton("<<");
JButton btleft = new JButton(">>");
JButton btdelet = new JButton("删除");
JButton btamend = new JButton("修改");
JButton btsave = new JButton("保存");
JButton btadd = new JButton("添加");
public Departmentmanage(){

setTitle("部门信息管理");
btsave.setEnabled(false);

getContentPane().setLayout(null);
Font f = new Font("新宋体",0,14);
btleft.setFont(f);

lb1.setFont(new java.awt.Font("新宋体", 1, 18));
lb1.setForeground(new Color(0, 51, 255));
getContentPane().add(lb1);
lb1.setBounds(110, 20, 160, 30);

lb2.setFont(f);
getContentPane().add(lb2);
lb2.setBounds(40, 85, 70, 20);
lb3.setFont(f);
getContentPane().add(lb3);
lb3.setBounds(40, 125, 70, 20);
lb4.setFont(f);
getContentPane().add(lb4);
lb4.setBounds(40,165,70,20);
lb5.setFont(f);
getContentPane().add(lb5);
lb5.setBounds(40,205,70,20);

getContentPane().add(tnumber);
tnumber.setBounds(155,85,100,23);
getContentPane().add(tname);
tname.setBounds(155,125,120,23);
getContentPane().add(tcount);
tcount.setBounds(155,165,120,23);

btright.setFont(f);
getContentPane().add(btright);
btright.setBounds(330, 250, 50, 20);

btleft.setFont(f);
getContentPane().add(btleft);
btleft.setBounds(330, 230, 50, 20);


btdelet.setFont(f);
getContentPane().add(btdelet);
btdelet.setBounds(250, 240, 70, 25);

btamend.setFont(f);
getContentPane().add(btamend);
btamend.setBounds(170, 240, 70, 25);

btsave.setFont(f);
getContentPane().add(btsave);
btsave.setBounds(10, 240, 70, 25);

btadd.setFont(f);
getContentPane().add(btadd);
btadd.setBounds(90, 240, 70, 25);
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
setBounds((screenSize.width-403)/2, (screenSize.height-329)/2, 403, 329);
wjh0205 2008-06-02
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Departmentmanage 有没有那个那个空参的构造方法？
zwgs1985 2008-06-02
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？我试过了，可以运行的
¦ ¦ 怎么回事？
应该是||
发出去怎么就被改掉了？
ppllxx123123ppllxx 2008-06-02
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7楼的朋友如果将代码改成你说的那样就提示这样的错误：java.lang.NoSuchMethodError: main
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