using apache library it can be done in one line
import org.apache.commons.lang.RandomStringUtils;
RandomStringUtils.randomAlphanumeric(64);
here is doc http://commons.apache.org/lang/api-2.3/org/apache/commons/lang/RandomStringUtils.html
using apache library it can be done in one line
import org.apache.commons.lang.RandomStringUtils;
RandomStringUtils.randomAlphanumeric(64);
here is doc http://commons.apache.org/lang/api-2.3/org/apache/commons/lang/RandomStringUtils.html