一个问题是eclipse -64位版本和我们的Java安装为32位版本之间的冲突。这个问题不容易解决，因为Java安装页面没有提供64位的选项——它假设是32位，然后下载并安装32位的版本。要解决此问题，请遵循以下步骤:

通过转到Java SE运行时环境7下载64bit版本(此链接为我们提供了下载64bit版本Java的选项)。下载并安装。 现在，尝试安装Eclipse仍然会抛出一个错误。因此，我们从C:/program files/Java/复制jre7文件夹，并将其复制到Eclipse安装文件夹中。 现在，我们将其重命名为jre。

安装Eclipse。

——launcher.appendVmargs 虚拟机 C:\Program Files\Java\ jdk1.7.0_79 \ jre \ bin \ javaw.exe —vmargs

在eclipse.ini文件中，需要更新VM的路径，使其指向机器上安装javaw.exe的同一位置。

关于只设置JAVA_HOME的所有其他答案都不完全正确。Eclipse也就是不咨询JAVA_HOME。仔细查看错误消息:

.．.在当前路径中

它字面上说的是PATH，而不是JAVA_HOME。

右键单击“我的电脑”，选择“属性”(或按Winkey+暂停)，进入“高级”页签，单击“环境变量”按钮，在底部的“系统变量”列表中选择“路径”(不，不是“Classpath”)，单击“编辑”，将“c:\ Path \to\jdk\bin”添加到值的末尾。

或者，如果没有，也可以添加JAVA_HOME环境变量，并在PATH中使用它。在同一个对话框中单击New并将值为c:\path\的JAVA_HOME添加到\jdk。然后您可以将;%JAVA_HOME%\bin添加到Path设置值的末尾。

尝试将JAVA_HOME设置为正确的文件夹。谷歌用于设置Windows环境变量。

JDK不会在默认路径下安装JVM。

除非您像ant一样需要外部工具来运行，否则非jdk就足以让Eclipse运行。安装这样的JVM最简单的方法是访问http://java.com，让它安装它想安装的任何东西。

然后再次双击Eclipse二进制文件。

我也遇到过这个问题。我的案例如下:

在文本:

HKEY_CURRENT_USER\Environment
    Path    REG_SZ    %JAVA_HOME%\bin;C:\ProgramFiles\nodejs

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Environment
    JAVA_HOME    REG_SZ    C:\ProgramFiles\Java\jdk
    Path    REG_EXPAND_SZ    C:\bin;%SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem;%SYSTEMROOT%\System32\
WindowsPowerShell\v1.0\;C:\Program Files\Intel\DMIX;c:\Program Files (x86)\Microsoft SQL Server\90\Tools\binn\;C:\Progra
m Files (x86)\Perforce;C:\ProgramFiles\010 Editor;C:\Program Files\Microsoft SQL Server\130\Tools\Binn\;C:\ProgramFiles\
Git\cmd;C:\Program Files (x86)\Skype\Phone\

C:\Users\ssfang> echo %^JAVA_HOME% = "%^JAVA_HOME%" = %%JAVA_HOME%% %JAVA_HOME%
%JAVA_HOME% = "%^JAVA_HOME%" = %C:\ProgramFiles\Java\jdk% C:\ProgramFiles\Java\jdk

我发现他们的注册表值Path的类型是不同的，所以我用下面的命令检查路径是否有效:

C:\Users\ssfang> where node java
C:\ProgramFiles\nodejs\node.exe
INFO: Could not find "java".

因此，我通过以下命令(Setx)重置本地(当前用户)环境:

C:\Users\ssfang> setx PATH %^JAVA_HOME%\bin;"C:\ProgramFiles\nodejs"

SUCCESS: Specified value was saved.

C:\Users\ssfang> reg query HKEY_CURRENT_USER\Environment /v Path

HKEY_CURRENT_USER\Environment
    Path    REG_EXPAND_SZ    %JAVA_HOME%\bin;C:\ProgramFiles\nodejs

C:\Users\ssfang> where node java
C:\ProgramFiles\nodejs\node.exe
INFO: Could not find "java".

C:\Users\ssfang>echo %PATH%
C:\bin;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Fi
les\Intel\DMIX;c:\Program Files (x86)\Microsoft SQL Server\90\Tools\binn\;C:\Program Files (x86)\Perforce;C:\ProgramFile
s\010 Editor;C:\Program Files\Microsoft SQL Server\130\Tools\Binn\;C:\ProgramFiles\Git\cmd;C:\Program Files (x86)\Skype\
Phone\;%JAVA_HOME%\bin;C:\ProgramFiles\nodejs

但是，在当前流程中，它不能将这些更改传播到其他正在运行的流程。

但是，如果直接在“注册表编辑器”中修改用户环境变量，

those modifications to the environment variables do not result in immediate change. For example, if you start another Command Prompt after making the changes, the environment variables will reflect the previous (not the current) values. The changes do not take effect until you log off and then log back on. To effect these changes without having to log off, broadcast a WM_SETTINGCHANGE message to all windows in the system, so that any interested applications (such as Windows Explorer, Program Manager, Task Manager, Control Panel, and so forth) can perform an update.

详细信息请参见如何将环境变量传播到系统

在这里，我给出了一个powershell脚本来完成它:

# powershell -ExecutionPolicy ByPass -File
# Standard, inline approach: (i.e. behaviour you'd get when using & in Linux)
# START /B CMD /C CALL "foo.bat" [args [...]]
# powershell -ExecutionPolicy ByPass -WindowStyle Hidden -File myScript.ps1 


<#
Add-Type @'

public class CSharp
{
    public static void Method(object[] first, object[] second)
    {
        System.Console.WriteLine("Hello world");
    }
}
'@
$a = 1..4;
[string[]]$b = "a","b","c","d";
[CSharp]::Method($a, $b);
#>


<#

#http://stackoverflow.com/questions/16552801/how-do-i-conditionally-add-a-class-with-add-type-typedefinition-if-it-isnt-add

#Problem Add-Type : Cannot add type. The type name 'PInvoke.User32' already exists.

if (-not ("MyClass" -as [type])) {
    add-type @"
    public class MyClass { }
"@
}


p.s. there's no Remove-Type; see this answer for more on how to best work around this limitation:
http://stackoverflow.com/questions/3369662/can-you-remove-an-add-ed-type-in-powershell-again

I think it will be wanted when debugging.
It is much simpler to close a tab in Console and open new one in PowerShell_ISE.exe or close PowerShell.exe.

Or

Start-Job -ScriptBlock {
    param([uri]$url,$OutputDir)
    # download and save pages
    Invoke-RestMethod $url | Out-File "$OutputDir\$($url.Segments[-1])" -Force
} -ArgumentList $link,$OutputDir

#>
if (-not ([System.Management.Automation.PSTypeName]'PInvoke.Program').Type)
{
    $sig=@"
using System;
using System.Runtime.InteropServices;
using System.Text;
using System.Collections.Generic;

// The global namespace is the "root" namespace: global::system will always refer to the .NET Framework namespace System.

///P/Invoke (Platform Invoke)
namespace PInvoke
{
    public static class User32
    {
        /// http://www.pinvoke.net/default.aspx/Constants/HWND.html
        // public const IntPtr HWND_BROADCAST = new IntPtr(0xffff);
        /// https://msdn.microsoft.com/en-us/library/windows/desktop/ms725497(v=vs.85).aspx
        /// http://www.pinvoke.net/default.aspx/Constants/WM.html
        public const UInt32 WM_SETTINGCHANGE = 0x001A;

        // SendMessageTimeout(HWND_BROADCAST, WM_SETTINGCHANGE, 0,    (LPARAM) "Environment", SMTO_ABORTIFHUNG,    5000, &dwReturnValue);

        /// https://msdn.microsoft.com/en-us/library/windows/desktop/ms644952(v=vs.85).aspx
        /// If the function succeeds, the return value is nonzero. 
        [System.Runtime.InteropServices.DllImport("user32.dll", EntryPoint = "SendMessageTimeout", SetLastError = true)]
        public static extern uint SendMessageTimeout(IntPtr hWnd, uint Msg, int wParam, string lParam, SendMessageTimeoutFlags fuFlags, uint uTimeout, out int lpdwResult);
    }

    [Flags]
    public enum SendMessageTimeoutFlags : uint
    {
        SMTO_NORMAL = 0x0,
        SMTO_BLOCK = 0x1,
        SMTO_ABORTIFHUNG = 0x2,
        SMTO_NOTIMEOUTIFNOTHUNG = 0x8,
        SMTO_ERRORONEXIT = 0x20
    }

    public class Program
    {
        public static void Main(string[] args)
        {
            //int innerPinvokeResult;
            //uint pinvokeResult = User32.SendMessageTimeout(User32.HWND_BROADCAST, User32.WM_SETTINGCHANGE, 0, "Environment", SendMessageTimeoutFlags.SMTO_NORMAL, 1000, out innerPinvokeResult);
            Console.WriteLine("Over!!!!!!!!!!!!!!!!!!!!!!!!!");
        }
    }
}
"@

    Add-Type -TypeDefinition $sig
}


## [PInvoke.Program]::Main([IntPtr]::Zero);

$innerPinvokeResult=[int]0
[PInvoke.User32]::SendMessageTimeout([IntPtr]0xffff, [PInvoke.User32]::WM_SETTINGCHANGE, 0, "Environment", [PInvoke.SendMessageTimeoutFlags]::SMTO_NORMAL, 1000, [ref]$innerPinvokeResult);

对于Setx Setx [/s [/u [] [/p]]]]] [/m]

/m Specifies to set the variable in the system environment. The default setting is the local environment