src/main/java/org/spigotmc/builder/Bootstrap.java


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package org.spigotmc.builder;

public class Bootstrap
{

    public static void main(String[] args) throws Exception
    {
        float javaVersion = Float.parseFloat( System.getProperty( "java.class.version" ) );

        if ( javaVersion < 51.0 )
        {
            System.err.println( "Outdated Java detected (" + javaVersion + "). BuildTools requires at least Java 7. Please update Java and try again." );
            System.err.println( "You may use java -version to double check your Java version." );
            return;
        }

        if ( javaVersion != 52.0 )
        {
            System.err.println( "*** WARNING *** You are not using Java 8. Java 8 is the only supported version for Minecraft versions >= 1.12." );
            System.err.println( "*** WARNING *** Please use java -version to check your version and note that early access versions of Java are not supported either." );
        }

        Builder.main( args );
    }
}