enum使用

public enum TaskState {

	init, checkedRequest, checkedResource, resourceLack, checkedCopyFinish, unZip, runCalcul, checkedNewOutput, zipAndCopyOutput, checkedProcessState, end, error,

}

 自定义的enum类，

使用一般使用enum都是switch吧？

反正我是这么用的

public void run() {
		TaskState ta = TaskState.init;
		while (shutdownRequested) {
			switch (ta) {
			//init state
			case init:
				if (checkRequest() != 0) {
					ta = TaskState.checkedRequest;
					sleepTime(config.getWAITTIMEN1());
				}
				else{
				sleepTime(config.getWAITTIMEN1());
				}
				break;
			//a new Request file find
			case checkedRequest:
				if (checkConditions() == 0) {
					ta = TaskState.resourceLack;
				} else {
					ta = TaskState.checkedResource;
				}
				break;
			//compute resource lack
			case resourceLack:
				outputResourceLack();
				clearFolder();
				ta = TaskState.init;
				break;
			//compute resource OK
			case checkedResource:
				if (checkedCopyFinish() == 0) {

				} else {
					ta = TaskState.checkedCopyFinish;
				}
				break;
			//compute file zip copy finished
			case checkedCopyFinish:
				unzipFolder();
				ta = TaskState.unZip;
				break;
			//unzip ok
			case unZip:
				runCalcul();
				ta = TaskState.runCalcul;
				break;
			//run calcul.exe 
			case runCalcul:
				int i = checkProcessState();
				if (i == 1) {
					ta = TaskState.checkedProcessState;
				}
				if (i == 2) {
					ta = TaskState.end;
				}
				if (i == 2) {
					ta = TaskState.error;
				}
				break;
			//the calcul process is running 
			case checkedProcessState:
				if (checkNewOutput() == 0) {
					ta = TaskState.runCalcul;
				} else {
					ta = TaskState.checkedNewOutput;
				}
				break;
			//a new intermediate results output 
			case checkedNewOutput:
				zipFolder();
				ta = TaskState.runCalcul;
				break;
			//the process end
			case end:
				zipFolder();
				clearFolder();
				ta = TaskState.init;
				break;
			//the process error
			case error:
				zipFolder();
				clearFolder();
				ta = TaskState.init;
				break;

			default:
				//write answer file ,and thread sleep 
				updateAnswer();				
				break;

			}

		}

	}

 

大家随便看看吧，比较简单的switch配合 enum