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26 lines
877 B
Markdown
26 lines
877 B
Markdown
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When you have both Java 6 and Java 7 installed, the default Java may not be Java 7.
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Do this by typing `java -version`, and check the output.
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- If the output is like **"java version "1.7.0_xx"**, then the default Java is Java 7, which is good.
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- If the output is like **"java version "1.6.0_xx"**, then the default Java is Java 6, we need to configure default Java to Java 7.
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If the default Java is Java 6, then do
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On Debian/Ubuntu:
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```
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sudo update-alternatives --config java
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```
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On CentOS/RHEL:
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```
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sudo alternatives --config java
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```
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The above command will ask you to choose one of the installed Java versions as default. You should choose Java 7 here.
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After that, re-run `java -version` to make sure the change has taken effect.
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[Reference link](http://unix.stackexchange.com/questions/35185/installing-openjdk-7-jdk-does-not-update-java-which-is-still-version-1-6)
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