import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.Properties;
public class PropertiesTest {
public static void main(String[] args) {
Properties prot=new Properties();
try {
prot.load(new FileInputStream("test.txt"));
int num=Integer.parseInt(prot.getProperty("test"))+1;
System.out.println("这是第"+num+"次运行");
prot.setProperty("test",new Integer(num).toString());
} catch (Exception e) {
prot.setProperty("test",String.valueOf(0));
System.out.println("这是第"+String.valueOf(0)+"次运行");
}
try {
//可以接收非字符串的值
prot.store(new FileOutputStream("test.txt"),"Program is used num");
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}