調試過程中大寫字母與大寫字母環境var名稱

在調試與啓動會話期間，以下不同行爲可能導致什麼情況？調試過程中大寫字母與大寫字母環境var名稱

在eclipse-debug和maven-run中，我在Eclipse中運行時獲取所有大寫的環境變量，其中一些保持在windows中定義的狀態。

@Test 
public void testEnvironmentVariables() { 
    ArrayList<String> keys = new ArrayList<>(System.getenv().keySet()); 
    Collections.sort(keys); 
    System.out.println(keys); 
}

如果由運行執行的輸出：注意到http.proxyUser

[=::, ALLUSERSPROFILE, APPDATA, APR_ICONV_PATH, CLASSPATH, CLINK_DIR, COMPUTERNAME, ChocolateyBinRoot, ChocolateyInstall, ComSpec, CommonProgramFiles, CommonProgramFiles(x86), CommonProgramW6432, DEBUG_PORT, DEFLOGDIR, EC_COMPUTER_OU, EC_HOMEAPPDATA, EC_USER_DEPARTMENT, EC_USER_DG, EC_USER_DISPLAY_NAME, EC_USER_ELK, EC_USER_OU, EXTRA_JAVA_PROPERTIES, FP_NO_HOST_CHECK, GRADLE_HOME, HOMEDRIVE, HOMEPATH, JAVA_HOME, JAVA_OPTS, LDMS_LOCAL_DIR, LOCALAPPDATA, LOGONSERVER, LocalRunSetup, M2, M2_HOME, M2_REPO, MAVEN_OPTS, MW_HOME, NUMBER_OF_PROCESSORS, ORACLE_BASE, ORACLE_HOME, OS, PATH2, PATHEXT, PROCESSOR_ARCHITECTURE, PROCESSOR_IDENTIFIER, PROCESSOR_LEVEL, PROCESSOR_REVISION, PSModulePath, PUBLIC, Path, ProgramData, ProgramFiles, ProgramFiles(x86), ProgramW6432, SBT_HOME, SESSIONNAME, SFT_SOFTGRIDSERVER, SystemDrive, SystemRoot, TEMP, TMP, USERDNSDOMAIN, USERDOMAIN, USERDOMAIN_ROAMINGPROFILE, USERNAME, USERPROFILE, UUMDS_CFG, VAGRANT_HOME, VBOX_MSI_INSTALL_PATH, VSEDEFLOGDIR, chocolatey_bin_root, debugFlag, http.proxyHost, http.proxyPassword, http.proxyPort, http.proxyUser, http_proxy, https.proxyHost, https.proxyPassword, https.proxyPort, https.proxyUser, https_proxy, myProxy, no_proxy, uumds.config.location, windir, windows_tracing_flags, windows_tracing_logfile]

輸出如果由調試執行：通知HTTP.PROXYUSER

[ALLUSERSPROFILE, APPDATA, APR_ICONV_PATH, CHOCOLATEYBINROOT, CHOCOLATEYINSTALL, CHOCOLATEY_BIN_ROOT, CLASSPATH, CLINK_DIR, COMMONPROGRAMFILES, COMMONPROGRAMFILES(X86), COMMONPROGRAMW6432, COMPUTERNAME, COMSPEC, DEBUGFLAG, DEBUG_PORT, DEFLOGDIR, EC_COMPUTER_OU, EC_HOMEAPPDATA, EC_USER_DEPARTMENT, EC_USER_DG, EC_USER_DISPLAY_NAME, EC_USER_ELK, EC_USER_OU, EXTRA_JAVA_PROPERTIES, FP_NO_HOST_CHECK, GRADLE_HOME, HOMEDRIVE, HOMEPATH, HTTP.PROXYHOST, HTTP.PROXYPASSWORD, HTTP.PROXYPORT, HTTP.PROXYUSER, HTTPS.PROXYHOST, HTTPS.PROXYPASSWORD, HTTPS.PROXYPORT, HTTPS.PROXYUSER, HTTPS_PROXY, HTTP_PROXY, JAVA_HOME, JAVA_OPTS, LDMS_LOCAL_DIR, LOCALAPPDATA, LOCALRUNSETUP, LOGONSERVER, M2, M2_HOME, M2_REPO, MAVEN_OPTS, MW_HOME, MYPROXY, NO_PROXY, NUMBER_OF_PROCESSORS, ORACLE_BASE, ORACLE_HOME, OS, PATH, PATH2, PATHEXT, PROCESSOR_ARCHITECTURE, PROCESSOR_IDENTIFIER, PROCESSOR_LEVEL, PROCESSOR_REVISION, PROGRAMDATA, PROGRAMFILES, PROGRAMFILES(X86), PROGRAMW6432, PROMPT, PSMODULEPATH, PUBLIC, SBT_HOME, SESSIONNAME, SFT_SOFTGRIDSERVER, SYSTEMDRIVE, SYSTEMROOT, TEMP, TMP, USERDNSDOMAIN, USERDOMAIN, USERDOMAIN_ROAMINGPROFILE, USERNAME, USERPROFILE, UUMDS.CONFIG.LOCATION, UUMDS_CFG, VAGRANT_HOME, VBOX_MSI_INSTALL_PATH, VSEDEFLOGDIR, WINDIR, WINDOWS_TRACING_FLAGS, WINDOWS_TRACING_LOGFILE]

如果從行家執行：注意HTTP.PROXYUSER testEnvironment=[=::, =C:, =EXITCODE, ALLUSERSPROFILE, APPDATA, APR_ICONV_PATH, CHOCOLATEYBINROOT, CHOCOLATEYINSTALL, CHOCOLATEY_BIN_ROOT, CLASSPATH, CLASSWORLDS_JAR, CLASSWORLDS_LAUNCHER, CLINK_DIR, COMMANDER_DRIVE, COMMANDER_EXE, COMMANDER_INI, COMMANDER_PATH, COMMONPROGRAMFILES, COMMONPROGRAMFILES(X86), COMMONPROGRAMW6432, COMPUTERNAME, COMSPEC, DEBUGFLAG, DEBUG_PORT, DEFLOGDIR, EC_COMPUTER_OU, EC_HOMEAPPDATA, EC_USER_DEPARTMENT, EC_USER_DG, EC_USER_DISPLAY_NAME, EC_USER_ELK, EC_USER_OU, ERROR_CODE, EXEC_DIR, EXTRA_JAVA_PROPERTIES, FP_NO_HOST_CHECK, GRADLE_HOME, HOME, HOMEDRIVE, HOMEPATH, HTTP.PROXYHOST, HTTP.PROXYPASSWORD, HTTP.PROXYPORT, HTTP.PROXYUSER, HTTPS.PROXYHOST, HTTPS.PROXYPASSWORD, HTTPS.PROXYPORT, HTTPS.PROXYUSER, HTTPS_PROXY, HTTP_PROXY, JAVA_HOME, JAVA_OPTS, LDMS_LOCAL_DIR, LOCALAPPDATA, LOCALRUNSETUP, LOGONSERVER, M2, M2_HOME, M2_REPO, MAVEN_CMD_LINE_ARGS, MAVEN_JAVA_EXE, MAVEN_OPTS, MAVEN_PROJECTBASEDIR, MW_HOME, MYPROXY, NO_PROXY, NUMBER_OF_PROCESSORS, ORACLE_BASE, ORACLE_HOME, OS, PATH, PATH2, PATHEXT, PROCESSOR_ARCHITECTURE, PROCESSOR_IDENTIFIER, PROCESSOR_LEVEL, PROCESSOR_REVISION, PROGRAMDATA, PROGRAMFILES, PROGRAMFILES(X86), PROGRAMW6432, PROMPT, PSMODULEPATH, PUBLIC, SBT_HOME, SESSIONNAME, SFT_SOFTGRIDSERVER, SYSTEMDRIVE, SYSTEMROOT, TEMP, TMP, USERDNSDOMAIN, USERDOMAIN, USERDOMAIN_ROAMINGPROFILE, USERNAME, USERPROFILE, UUMDS.CONFIG.LOCATION, UUMDS_CFG, VAGRANT_HOME, VBOX_MSI_INSTALL_PATH, VSEDEFLOGDIR, WDIR, WINDIR, WINDOWS_TRACING_FLAGS, WINDOWS_TRACING_LOGFILE]

我發現了一個類似的問題在這裏：https://www.eclipse.org/forums/index.php?t=msg&th=77986&goto=242568&#msg_242568但沒有任何回答。

我使用java8的windows7上和eclipse氖

>java -version 
java version "1.8.0_77" 
Java(TM) SE Runtime Environment (build 1.8.0_77-b03) 
Java HotSpot(TM) 64-Bit Server VM (build 25.77-b03, mixed mode) 

Eclipse Java EE IDE for Web Developers 
Version: Neon Release (4.6.0) 
Build id: 20160613-1800 

> mvn -version 
Apache Maven 3.3.3 (7994120775791599e205a5524ec3e0dfe41d4a06; 2015-04-22T13:57:37+02:00) 
Maven home: C:\costin\apps\apache-maven-3.3.3 
Java version: 1.8.0_77, vendor: Oracle Corporation 
Java home: C:\Program Files\Java\jdk1.8.0_77\jre 
Default locale: en_GB, platform encoding: Cp1252 
OS name: "windows 7", version: "6.1", arch: "amd64", family: "dos"

來源

2016-08-30 raisercostin

沒有人擁有相同的順序garatuees。什麼沒有指定，可以是隨機的（至少在未來）。你使用相同的VM版本嗎？ –

@PeterRader，我認爲他指的是變量的情況，而不是指令本身。順便問一句好問題。 –

@XtremeBiker啊這種情況？這是一個糟糕的問題，因爲由http://grepcode.com/file/repository.grepcode.com/java/root/jdk/openjdk/6-b14/java/lang/ProcessEnvironment.java#71填充的hashmaps是不同的。 –

您使用JPDA不進行調試。使用JPDA，你會看到與System中使用的完全相同的HashMap。您必須使用兩個不同的vm執行，因爲這些鍵的順序不同，這不是100％的java調試。

在兩個不同的進程中，可以通過在environment-variables之前使用system-properties來執行不同的執行命令。

來源

2016-08-30 16:25:35

您正在從關鍵順序中聲稱的差異中得出奇怪的結論。首先，只要相同的密鑰存在，順序不會*不同。其次，原因，順序沒有區別，在打印語句之前有一個明確的'Collections.sort（keys）'。 – Holger

你說得對，我沒有使用JPDA進行調試。我在日食中做這個。我執行測試類：從eclipse菜單中選擇：運行>運行方式> JUnit測試或運行>調試爲> Junit測試。 – raisercostin

@Holger我真的認爲'uumds.config.location'是在錯誤的位置！ –

調試過程中大寫字母與大寫字母環境var名稱

回答

相關問題