2021-09-17 IO流(系统信息)

import java.io.FileNotFoundException;
import java.io.PrintStream;
import java.util.Properties;

public class SystemInfo {

    public static void main(String[] args) throws FileNotFoundException {
        Properties prop = System.getProperties();
//        System.out.println(prop);
        prop.list(System.out);
        prop.list(new PrintStream("E:\\sysInfo.txt"));
    }

}