java的printstram使用

package system.system;

import java.io.IOException;
import java.io.PrintStream;
import java.nio.charset.StandardCharsets;

public class print {
    public static void main(String[] args) throws IOException {
        PrintStream out=System.out;
        out.print("hi,北京你好");//结果显示到显示屏上
        out.write("韩顺平教育".getBytes(StandardCharsets.UTF_8));
        out.close();
        //system.out编译类型和运行类型都是printstream
    }//system.in编译类型是inputstream运行类型bufferediuputstream
}