4-5编程练习？？？对不对
package com.imooc.file;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
public class FileDemo2 {
public void transWriteByBuf(){
try {
FileOutputStream fos=new FileOutputStream("hello.txt");
OutputStreamWriter osw=new OutputStreamWriter(fos);
BufferedWriter bfw=new BufferedWriter(osw);
// bfw.write("你好吗？");
// bfw.write("我很好！");
bfw.write("你好吗？\n我很好！");
fos.close();
osw.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
}catch (IOException e) {
e.printStackTrace();
}
}
public void tranReadByBuf(){
try {
FileInputStream fis=new FileInputStream("hello.txt");
InputStreamReader isr=new InputStreamReader(fis);
BufferedReader bfd=new BufferedReader(isr);
// System.out.println(bfd.read());
// System.out.println(bfd.read());
int n;
while((n=bfd.read())!=-1){
System.out.println((char)n);
}
fis.close();
isr.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
}catch (IOException e) {
e.printStackTrace();
}
}
}
package com.imooc.file;
public class FileDeomTest {
public static void main(String[] args) {
FileDemo2 f2=new FileDemo2();
f2.transWriteByBuf();
f2.tranReadByBuf();
}
}正在回答 回答被采纳积分+1
package com.imooc.file;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
public class FileDemo2 {
public void transWriteByBuf(){
try {
FileOutputStream fos=new FileOutputStream("hello.txt");
OutputStreamWriter osw=new OutputStreamWriter(fos);
BufferedWriter bfw=new BufferedWriter(osw);
// bfw.write("你好吗？");
// bfw.write("我很好！");
bfw.write("你好吗？\n我很好！");
bfw.close();
fos.close();
osw.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
}catch (IOException e) {
e.printStackTrace();
}
}
public void tranReadByBuf(){
try {
FileInputStream fis=new FileInputStream("hello.txt");
InputStreamReader isr=new InputStreamReader(fis);
BufferedReader bfd=new BufferedReader(isr);
// System.out.println(bfd.read());
// System.out.println(bfd.read());
String str;
while((str=bfd.readLine())!=null){
System.out.println(str);
}
bfd.close();
fis.close();
isr.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
}catch (IOException e) {
e.printStackTrace();
}
}
}
package com.imooc.file;
public class FileDeomTest {
public static void main(String[] args) {
FileDemo2 f2=new FileDemo2();
f2.transWriteByBuf();
f2.tranReadByBuf();
}
}
package com.imooc.file;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
public class FileDemo2 {
public void transWriteByBuf(){
try {
FileOutputStream fos=new FileOutputStream("hello.txt");
OutputStreamWriter osw=new OutputStreamWriter(fos);
BufferedWriter bfw=new BufferedWriter(osw);
// bfw.write("你好吗？");
// bfw.write("我很好！");
bfw.write("你好吗？\n我很好！");
fos.close();
osw.close();
bfw.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
}catch (IOException e) {
e.printStackTrace();
}
}
public void tranReadByBuf(){
try {
FileInputStream fis=new FileInputStream("hello.txt");
InputStreamReader isr=new InputStreamReader(fis);
BufferedReader bfd=new BufferedReader(isr);
// System.out.println(bfd.read());
// System.out.println(bfd.read());
String str;
while((str=bfd.readLine())!=null){
System.out.println(str);
}
fis.close();
isr.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
}catch (IOException e) {
e.printStackTrace();
}
}
}
package com.imooc.file;
public class FileDeomTest {
public static void main(String[] args) {
FileDemo2 f2=new FileDemo2();
f2.transWriteByBuf();
f2.tranReadByBuf();
}
}//修改后的代码
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