写OO作业过程中现学的东西

String latter = name.substring(name.lastIndexOf(".") + 1); //不包括"."，比如"java"，而不是".java"

将文件中的内容读入到String数组中——

		BufferedReader br = null;
		try{
			br = new BufferedReader(new FileReader(fileName));
		}catch(Exception e){
			System.out.println("Error! Opening new buffer for file fails!");
		}
		String tmpString = null;							// A good way to read a file and convert to a string
        StringBuffer sb = new StringBuffer();				
        try {
			while ((tmpString = br.readLine()) != null) {
			    sb.append(tmpString);						//read the file context into stringbuffer
			    sb.append('\n');							//readLine会忽略行尾的\n，我们手动加上，一会儿作为单词分割的“分割词”
			}
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

        String [] words = sb.toString().split(",|\\.|\\?|:|!|\\n|\\t| ");		// result in blank string when appear together
//      String [] test = sb.toString().split("(,|\\.|\\?|:|!|\\n|\\t| )+");		//TODO: won't appear so many blank string
        List<String> l = new ArrayList<String>();		// A good way to delete special element in array
        for(String s : words){
        	l.add(s);
        }
        while(l.contains("")){
        	l.remove("");
        }
        words = l.toArray(new String [l.size()]);		//用l中的元素为内容创建数组，再进行元素复制，但由于返回类型是Object[]，所以进行显式转换。

ArrayList<WordInfo> al = CountTxt.hashMap.get(CountTxt.word);
al.sort(new FrequencyComparator());

import java.util.Timer;
import java.util.TimerTask;

public class M {
	public static void main(String[] args) {
		// TODO todo.generated by zoer
		Timer timer = new Timer();
		timer.schedule(new MyTask(), 1000, 2000);
	}
}

class MyTask extends TimerTask {

	@Override
	public void run() {
		System.out.println("dddd");

	}

}

写OO作业过程中现学的东西

原文：http://blog.csdn.net/puppylpg/article/details/45874589