class HelloWorld{
public static void main(String[] args)
{
System.out.println("Hello World");
}} //上面这个测试,能编译能运行。
/*
Program MyFirstApplication
The first sample Java application
*/
import javabook.*;
class MyFirstApplication
{
public static void main(String[] args)
{
MainWindow mainWindow;
mainWindow = new MainWindow;
mainWindow.setVisable(true);
}
}//上面这个测试,不能编译。错误提示:
D:\MyFirstApplication.java:11: '(' or '[' expected
mainWindow = new MainWindow;
^ 注意这里有个^小东西
1 error
而在别人的机子上可以编译和运行的!/*
Program DisplayMessage
The program displays the text"I Love Java".
The program uses a MessageBox object from the javabook
package to display the text.
*/
import javabook.*;
class DisplayMessage
{
public static void main(String[] args)
{
//declare two objects
MainWindow mainWindow;
MessageBox messageBox;
//create two objects
mainWindow=new MainWindow("Display Message");
messageBox=new MessageBox(mainWindow);
//display two objects:first the frame and then the dialog
mainWindow.setVisble(ture);
messageBox.show("I Love Java");
}
}// 错误提示:
D:\DisplayMessage.java:7: package javabook does not exist
import javabook.*;
^
D:\DisplayMessage.java:13: cannot resolve symbol
symbol : class MainWindow
location: class DisplayMessage
MainWindow mainWindow;
^
D:\DisplayMessage.java:14: cannot resolve symbol
symbol : class MessageBox
location: class DisplayMessage
MessageBox messageBox;
^
D:\DisplayMessage.java:17: cannot resolve symbol
symbol : class MainWindow
location: class DisplayMessage
mainWindow=new MainWindow("Display Message");
^
D:\DisplayMessage.java:18: cannot resolve symbol
symbol : class MessageBox
location: class DisplayMessage
messageBox=new MessageBox(mainWindow);
^
D:\DisplayMessage.java:21: cannot resolve symbol
symbol : variable ture
location: class DisplayMessage
mainWindow.setVisble(ture);
^
6 errors请教大家这个是怎么一回事呢?怎么来解决呢?
还有上面的数字java:21、18、7等:是什么含义呢?感谢!
public static void main(String[] args)
{
System.out.println("Hello World");
}} //上面这个测试,能编译能运行。
/*
Program MyFirstApplication
The first sample Java application
*/
import javabook.*;
class MyFirstApplication
{
public static void main(String[] args)
{
MainWindow mainWindow;
mainWindow = new MainWindow;
mainWindow.setVisable(true);
}
}//上面这个测试,不能编译。错误提示:
D:\MyFirstApplication.java:11: '(' or '[' expected
mainWindow = new MainWindow;
^ 注意这里有个^小东西
1 error
而在别人的机子上可以编译和运行的!/*
Program DisplayMessage
The program displays the text"I Love Java".
The program uses a MessageBox object from the javabook
package to display the text.
*/
import javabook.*;
class DisplayMessage
{
public static void main(String[] args)
{
//declare two objects
MainWindow mainWindow;
MessageBox messageBox;
//create two objects
mainWindow=new MainWindow("Display Message");
messageBox=new MessageBox(mainWindow);
//display two objects:first the frame and then the dialog
mainWindow.setVisble(ture);
messageBox.show("I Love Java");
}
}// 错误提示:
D:\DisplayMessage.java:7: package javabook does not exist
import javabook.*;
^
D:\DisplayMessage.java:13: cannot resolve symbol
symbol : class MainWindow
location: class DisplayMessage
MainWindow mainWindow;
^
D:\DisplayMessage.java:14: cannot resolve symbol
symbol : class MessageBox
location: class DisplayMessage
MessageBox messageBox;
^
D:\DisplayMessage.java:17: cannot resolve symbol
symbol : class MainWindow
location: class DisplayMessage
mainWindow=new MainWindow("Display Message");
^
D:\DisplayMessage.java:18: cannot resolve symbol
symbol : class MessageBox
location: class DisplayMessage
messageBox=new MessageBox(mainWindow);
^
D:\DisplayMessage.java:21: cannot resolve symbol
symbol : variable ture
location: class DisplayMessage
mainWindow.setVisble(ture);
^
6 errors请教大家这个是怎么一回事呢?怎么来解决呢?
还有上面的数字java:21、18、7等:是什么含义呢?感谢!
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改为:mainWindow = new MainWindow;
我的Jdk已经配置好!
后错误少些拉,还有三错误!
D:\MyFirstApplication.java:5: package javabook does not exist
import javabook.*;
^
D:\MyFirstApplication.java:10: cannot resolve symbol
symbol : class MainWindow
location: class MyFirstApplication
MainWindow mainWindow;
^
D:\MyFirstApplication.java:11: cannot resolve symbol
symbol : class MainWindow
location: class MyFirstApplication
mainWindow = new MainWindow();
^
3 errors