19.6输出流OutputStream(覆盖写法)

package study;import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
//这种会覆盖文件的原本内容
public class Exercise {public static void main(String[] args) {
//1.创建源File f&＃61;new File("E:\\临时\\BBB.txt"); //没有此文件是会自动创建
//2.选择流OutputStream o&＃61;null;try {o&＃61;new FileOutputStream(f);
//3.操作String str&＃61;"hello java";byte[] b&＃61;str.getBytes(); //字符->字节&＃61;&＃61;编码o.write(b, 0, str.length());o.flush(); //强制刷新,释放内存,最好习惯写这个}catch(Exception e) {e.printStackTrace();}finally {try {o.close();} catch (IOException e) {e.printStackTrace();}}}}