Solution: file/usr/java/jdkxx/bin/java from install of jdkxx conf

Solution: file/usr/java/jdkxx/bin/java from install of jdkxx conf

This problem occurs when jdk is installed using the rpm package on centos7.
The problem is blind. I downloaded a 32-bit rpm package from the oracle official website. After the installation failed, I downloaded a 64-bit installation package and reported an error during the installation.
The reason is that the previously installed 32-bit package has not been uninstalled, and the installation conflict occurs. Just uninstall it. The method is as follows:
First, query the name of the jdk installed before. The full name must be used here. I will give it a pitfall:

> Rpm-qa | grep jdk> # Get jdk full name> jdk1.8.0 _ uninstall> # Uninstall a 32-bit jdk> rpm-e jdk1.8.0 _ 121-1.8.0_121-fcs.i586> # Install a 64-bit jdk> rpm- ivh jdk-8u121-linux-x64.rpm> # successful!