Below environment of Unix operating system, applied process can use Fork function to found child process, but child natural resources of process and the address space that should use order process to have independence, system and code carry out unit, and of the process attempering is finished by the operating system, make undertake between applied process communication and line Cheng are coordinated relatively complex. And the multi-line Cheng in Java application process is to share the many collateral code of natural resources of same application system to implement system, the communication between line Cheng and harmonious method are relatively simple.
　　
Can say: Java language correspondence used the support of ability of program multi-line Cheng to enhance Java to regard network programming as the advantage of the language, the intercurrent visit that to realize distributed applying the many client in the system carries and the response that raise a server efficiency lays solid foundation.