小编MrC*_*der的帖子

我一直试图解决这个问题,我已经在不同的程序中运行它,所以它肯定在代码中.可能也很简单.错误说

Password2.java:90:错误:找不到符号if(pw.equals(password))^符号:变量密码位置:class Password2.EnterButtonHandler 1错误

这是代码:

// Password1.java

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class Password2 extends JFrame // inherits from the JFrame class 
{
    // static final variables to hold frame dimensions (in pixels) 
    private static final int WIDTH = 400;
    private static final int HEIGHT = 120;

    //declare labels, fields, buttons, etc.
    private JLabel enterLabel, validLabel, resultLabel;
    private JTextField pwTextField;
    private JButton enterB, clearB;

    private EnterButtonHandler ebHandler;
    private ClearButtonHandler cbHandler;

    public Password2() // constructor defines frame …

我的最终目标是安装当前版本的Ruby on Rails.我在OS X Mountain Lion上运行.到目前为止,这是我的流程:

已安装的RVM

$ \curl -L https://get.rvm.io | bash -s stable

检查已知(并且我认为已批准)安装

$ rvm list known

我看到目前稳定的版本可用

[ruby-]2.0.0[-p247]

键入安装命令

$ rvm install 2.0.0-p247

注意:我也尝试过这些安装命令

$ rvm install ruby-2.0.0-p247
$ rvm install ruby=2.0.0-p247

我无处可去.结果:

$ rvm install 2.0.0-p247
Searching for binary rubies, this might take some time.
No binary rubies available for: osx/10.8/x86_64/ruby-2.0.0-p247.
Continuing with compilation. Please read 'rvm help mount' to get more information on binary rubies.
Installing requirements for osx, might require sudo password.
Certificates …

我试图通过这样的数组创建一个列表:

private Application[] GetApps()
{
DataSet ds = new Dataset();
string query = "query";
ds = GetData(query);

var appList = new Application[ds.Tables[0].Rows.Count];

for(var i = 0; i <= ds.Tables[0].Rows.Count - 1; i++)
{
                DataRow item = ds.Tables[0].Rows[i];

                appList[i].Name = item["Name"].ToString();
                appList[i].Confidentiality = int.Parse(item["Conf"].ToString());
                appList[i].Id = item["ID"].ToString();
}
return appList;
}

我一直得到一个对象null错误,我知道我必须遗漏一些完全明显的东西,我只是没有看到.我是否需要以其他方式声明新数组？