import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Properties;

public class MyProperties {

	public static void main(String[] args) {

		Properties pro = new Properties();
		
		try {
			pro.load(new FileInputStream("MyProperties.txt"));// 載入文件信息"
		} catch (FileNotFoundException e) {

			System.out.println("FileNotFoundException");

		} catch (IOException e) {

			System.out.println("IOException");
		}

		pro.setProperty("para", "hello java");// 寫進pro

		try {
			pro.store(new FileOutputStream("MyProperties.txt"), "title");// 寫文件
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}

		System.out.println(pro.getProperty("para")); //先讀緩存數(shù)據(jù)，后讀文件數(shù)據(jù)

	}

}