如题所述
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è¿ç§å®è£ å¯èªç±éæ©JDKçæ¬ï¼è½è¿è¡çµæ´»çé ç½®ã
1. å¨http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.htmlä¸ä¸è½½ç¸åºçæ¬çJDKç¯å¢ï¼æ¨èä¸è½½jdk-7u21-linux-i586.tar.gzã
2. ä¸è¬æéç³»ç»è½¯ä»¶å®è£ å°/optä¸ã
sudo cp /home/yourname/Doenloads/jdk-7u21-linux-i586.tar.gz /opt
cd /opt
sudo tar -zxvf jdk-7u21-linux-i586.tar.gz . (解åå°/optç®å½)
3. 设置ç¯å¢åé
å¨/etc/profileä¸æ·»å JDKé 置信æ¯ï¼
sudo gedit /etc/profile
å¨æåæ·»å å¦ä¸å 容ï¼
# set jdk environment
export JAVA_HOME=/opt/jdk1.7.0_21
export JRE_HOME=/opt/jdk1.7.0_21/jre
export CLASSPATH=.:$CLASSPATH:$JAVA_HOME/lib:$JRE_HOME/lib
export PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin
source /etc/profile ï¼è®©ååçé ç½®çæï¼
é ç½®ç¯å¢æ¶æå ç¹æ¯è¦æ³¨æçï¼
å¨é ç½®CLASSPATHãPATHæ¶è¦çå¿ï¼å¦æé ç½®çæé®é¢ï¼å¯è½ä¼åºç°è¿ä¸äºæ¡é¢çç°è±¡ãå¦ï¼æCLASSPATHè·¯å¾ä¸çâ.:CLASSPATHâåéï¼åæâ:CLASSPATHâæå ¶ä»å°±ä¼åºé®é¢ãåºç°é®é¢ä¸è¦ç´§ï¼æä¸Ctrl+Alt+F1è¿å ¥å½ä»¤è¡æ¨¡å¼ï¼å°å¯¹åºçé ç½®æ¹æ£ç¡®ï¼ç¶ååCtrl+Alt+F7åå°æ¡é¢å°±OKäºã
è¿æä¸ç¹å°±æ¯ï¼é ç½®ç¯å¢æ¶ï¼ç¯å¢å称å对åºçç¯å¢è·¯å¾ä¹é´ä¸è¦çç©ºæ ¼ï¼å¦JAVA_HOME=/opt/jdk1.7.0_21çâ=â两边ï¼åºä¸ºbashæ æ³è¯å«ã
4. ç±äºubuntuä¸èªå¸¦äºgijçJVMå®ç°ï¼æ以å¨ç»ç«¯é®å ¥âjava -versionâæ¶ä¼æ¾ç¤ºï¼java version "1.6.0"......çç¸å ³ä¿¡æ¯ãè¿æ¯è¯´ç³»ç»ä¸å·²ç»æäºJVMå®ç°ï¼èä¸gij JVMæ¯é»è®¤çJVMå®ç°ï¼è¢«å ¶ä»çubuntuå·¥å ·æ软件使ç¨ï¼ãè¿æ¶ï¼å°±è¦ä½¿ç¨Debianæä¾çâupdate-alternativesâå·¥å ·æ¥å®æå¤çæ¬å®ç°çéæ©ï¼
sudo update-alternatives --display java
åç°ç³»ç»åªå举äºgij JVMï¼å 为jdk7æ¯æå¨è§£åå®è£ çã
sudo update-alternatives --install /usr/bin/java java /opt/jdk1.7.0_21/bin/java 50
sudo update-alternatives --install /usr/bin/javac javac /opt/jdk1.7.0_21/bin/javac 50
sudo update-alternatives --install /usr/bin/javah javah /opt/jdk1.7.0_21/bin/javah 50
sudo update-alternatives --install /usr/bin/javaws javaws /opt/jdk1.7.0_21/bin/javaws 50
sudo update-alternatives --install /usr/bin/javap javap /opt/jdk1.7.0_21/bin/javap 50
å ¶å®åªè¦è®¾ç½®javaãjavacä¹æ¯OKçãè¡å°¾ç50æ¯ä¼å 级ã
ls -l /etc/alternatives/java
åç°JVMå·²ç»æåäºJDK7ç解åç®å½lrwxrwxrwx 1 root root 25 5æ 5 16:23 /etc/alternatives/java -> /opt/jdk1.7.0_21/bin/java
sudo update-alternatives --config javaããéæ©ååå®è£ çJDK
java -versionããåç°å·²ç»æ¯ java version 1.7.0äº OKã
JAVAå¼åç¯å¢å¹³é ç½®å®æï¼å¯ä»¥å¼å§ä½ å¨ubuntuä¸çjavaå¼åäº
è¿ç§å®è£ å¯èªç±éæ©JDKçæ¬ï¼è½è¿è¡çµæ´»çé ç½®ã
1. å¨http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.htmlä¸ä¸è½½ç¸åºçæ¬çJDKç¯å¢ï¼æ¨èä¸è½½jdk-7u21-linux-i586.tar.gzã
2. ä¸è¬æéç³»ç»è½¯ä»¶å®è£ å°/optä¸ã
sudo cp /home/yourname/Doenloads/jdk-7u21-linux-i586.tar.gz /opt
cd /opt
sudo tar -zxvf jdk-7u21-linux-i586.tar.gz . (解åå°/optç®å½)
3. 设置ç¯å¢åé
å¨/etc/profileä¸æ·»å JDKé 置信æ¯ï¼
sudo gedit /etc/profile
å¨æåæ·»å å¦ä¸å 容ï¼
# set jdk environment
export JAVA_HOME=/opt/jdk1.7.0_21
export JRE_HOME=/opt/jdk1.7.0_21/jre
export CLASSPATH=.:$CLASSPATH:$JAVA_HOME/lib:$JRE_HOME/lib
export PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin
source /etc/profile ï¼è®©ååçé ç½®çæï¼
é ç½®ç¯å¢æ¶æå ç¹æ¯è¦æ³¨æçï¼
å¨é ç½®CLASSPATHãPATHæ¶è¦çå¿ï¼å¦æé ç½®çæé®é¢ï¼å¯è½ä¼åºç°è¿ä¸äºæ¡é¢çç°è±¡ãå¦ï¼æCLASSPATHè·¯å¾ä¸çâ.:CLASSPATHâåéï¼åæâ:CLASSPATHâæå ¶ä»å°±ä¼åºé®é¢ãåºç°é®é¢ä¸è¦ç´§ï¼æä¸Ctrl+Alt+F1è¿å ¥å½ä»¤è¡æ¨¡å¼ï¼å°å¯¹åºçé ç½®æ¹æ£ç¡®ï¼ç¶ååCtrl+Alt+F7åå°æ¡é¢å°±OKäºã
è¿æä¸ç¹å°±æ¯ï¼é ç½®ç¯å¢æ¶ï¼ç¯å¢å称å对åºçç¯å¢è·¯å¾ä¹é´ä¸è¦çç©ºæ ¼ï¼å¦JAVA_HOME=/opt/jdk1.7.0_21çâ=â两边ï¼åºä¸ºbashæ æ³è¯å«ã
4. ç±äºubuntuä¸èªå¸¦äºgijçJVMå®ç°ï¼æ以å¨ç»ç«¯é®å ¥âjava -versionâæ¶ä¼æ¾ç¤ºï¼java version "1.6.0"......çç¸å ³ä¿¡æ¯ãè¿æ¯è¯´ç³»ç»ä¸å·²ç»æäºJVMå®ç°ï¼èä¸gij JVMæ¯é»è®¤çJVMå®ç°ï¼è¢«å ¶ä»çubuntuå·¥å ·æ软件使ç¨ï¼ãè¿æ¶ï¼å°±è¦ä½¿ç¨Debianæä¾çâupdate-alternativesâå·¥å ·æ¥å®æå¤çæ¬å®ç°çéæ©ï¼
sudo update-alternatives --display java
åç°ç³»ç»åªå举äºgij JVMï¼å 为jdk7æ¯æå¨è§£åå®è£ çã
sudo update-alternatives --install /usr/bin/java java /opt/jdk1.7.0_21/bin/java 50
sudo update-alternatives --install /usr/bin/javac javac /opt/jdk1.7.0_21/bin/javac 50
sudo update-alternatives --install /usr/bin/javah javah /opt/jdk1.7.0_21/bin/javah 50
sudo update-alternatives --install /usr/bin/javaws javaws /opt/jdk1.7.0_21/bin/javaws 50
sudo update-alternatives --install /usr/bin/javap javap /opt/jdk1.7.0_21/bin/javap 50
å ¶å®åªè¦è®¾ç½®javaãjavacä¹æ¯OKçãè¡å°¾ç50æ¯ä¼å 级ã
ls -l /etc/alternatives/java
åç°JVMå·²ç»æåäºJDK7ç解åç®å½lrwxrwxrwx 1 root root 25 5æ 5 16:23 /etc/alternatives/java -> /opt/jdk1.7.0_21/bin/java
sudo update-alternatives --config javaããéæ©ååå®è£ çJDK
java -versionããåç°å·²ç»æ¯ java version 1.7.0äº OKã
JAVAå¼åç¯å¢å¹³é ç½®å®æï¼å¯ä»¥å¼å§ä½ å¨ubuntuä¸çjavaå¼åäº
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