private void printMemory() {
        int mb = 1024 * 1024;
        Runtime rt = Runtime.getRuntime();
        long total = rt.totalMemory();
        long max = rt.maxMemory();
        long free = rt.freeMemory();
        System.out.print("total[" + total / mb + "mb] ");
        System.out.print("max[" + max / mb + "mb] ");
        System.out.println("free[" + free / mb + "mb]");
    }
rpc address parser
test soft reference

@author xiaomin.cxm
@version $Id: RpcAddressParser_SOFTREF_Test.java, v 0.1 Apr 6, 2016 10:45:13 AM xiaomin.cxm Exp $
src/test/java/com/alipay/remoting/rpc/addressargs/RpcAddressParser_SOFTREF_Test.java