package?java2017; import?java.io.File; import?java.io.FileNotFoundException; import?java.io.FileReader; import?java.io.FileWriter; import?java.io.IOException; public?class?writer?{ public?static?void?main(String[]?args)?{ //?TODO?Auto-generated?method?stub int?ch; try{ File?file=new?File("./bin//Hello.txt"); FileWriter?fw=new?FileWriter(file); fw.write("Hello?world!?How?are?you!"); fw.close(); FileReader?fr=new?FileReader(file); while((ch=fr.read())!=-1) System.out.print((char)ch); ????fr.close(); ???? }catch(FileNotFoundException?e){ System.out.println("文件不存在"); }catch(IOException?e){ System.out.println("發(fā)生IOE操作異常"); } }