GH-1365 rework java version parsing and sorting

logic/java/JavaInstall.cpp

@@ -0,0 +1,28 @@
+#include "JavaInstall.h"
+#include <MMCStrings.h>
+
+bool JavaInstall::operator<(const JavaInstall &rhs)
+{
+	auto archCompare = Strings::naturalCompare(arch, rhs.arch, Qt::CaseInsensitive);
+	if(archCompare != 0)
+		return archCompare < 0;
+	if(id < rhs.id)
+	{
+		return true;
+	}
+	if(id > rhs.id)
+	{
+		return false;
+	}
+	return Strings::naturalCompare(path, rhs.path, Qt::CaseInsensitive) < 0;
+}
+
+bool JavaInstall::operator==(const JavaInstall &rhs)
+{
+	return arch == rhs.arch && id == rhs.id && path == rhs.path;
+}
+
+bool JavaInstall::operator>(const JavaInstall &rhs)
+{
+	return (!operator<(rhs)) && (!operator==(rhs));
+}