请教一个IO流的问题,只要给出代码解决,马上结帖!!! 打开一个文本文件,每次读取一行内容。将每行作为一个String读入,并将那个String对象置入一个Vector里。按相反的顺序打印出Vector中的所有行 在上面的基础上又打开一个文本文件,以便将文字写入其中。将Vector中的行随同行号一起写入文件。 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 package zhao;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.FileNotFoundException;import java.io.FileReader;import java.io.FileWriter;import java.io.IOException;import java.util.Vector;public class Test { public static void main(String args[]) { Vector<String> v = new Vector<String>(); BufferedReader bufin = null; BufferedWriter bufout = null; try { bufin = new BufferedReader(new FileReader("D:\\eclipse\\test.txt")); String s = null; while((s=bufin.readLine()) != null) { v.add(s); } bufin.close(); String [] array = v.toArray(new String[v.size()]); for(int i=array.length-1;i>=0;i-- ) { System.out.println(array[i]); } bufout = new BufferedWriter(new FileWriter("D:\\eclipse\\testin.txt")); for(String s1:v) { bufout.write(s1+"\n"); } bufout.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); }finally { if(bufin!=null) { try { bufin.close(); } catch (IOException e) { e.printStackTrace(); } } if(bufout!=null) { try { bufout.close(); } catch (IOException e) { e.printStackTrace(); } } } } } 蹭分^_^import java.io.*;import java.util.*; public class Test{ public void doSomething(String inFileName,String outFileName) throws IOException{ File inFile = new File(inFileName); File outFile = new File(outFileName); BufferedReader br = new BufferedReader(new FileReader(inFile)); BufferedWriter bw = new BufferedWriter(new FileWriter(outFile)); String s = null; Vector<String> list = new Vector<String>(); while((s = br.readLine()) != null){ list.add(s); } br.close(); Collections.reverse(list); int line = 1; for(String tmp:list){ System.out.println(tmp); bw.write((line++) + "\t" + tmp); bw.newLine(); } bw.flush(); bw.close(); } public static void main(String[] args){ try { new Test().doSomething("C:/in.txt","C:/out.txt"); } catch (IOException e) { e.printStackTrace(); } }} // 再发一次,刚才行番号没打!package zhao;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.FileNotFoundException;import java.io.FileReader;import java.io.FileWriter;import java.io.IOException;import java.util.Vector;public class Test { public static void main(String args[]) { Vector<String> v = new Vector<String>(); BufferedReader bufin = null; BufferedWriter bufout = null; try { bufin = new BufferedReader(new FileReader("D:\\eclipse\\test.txt")); String s = null; while((s=bufin.readLine()) != null) { v.add(s); } bufin.close(); String [] array = v.toArray(new String[v.size()]); for(int i=array.length-1;i>=0;i-- ) { System.out.println(array[i]); } bufout = new BufferedWriter(new FileWriter("D:\\eclipse\\testin.txt")); int countnum = 1; String crlf=System.getProperty("line.separator"); for(String s1:v) { bufout.write(countnum+": "+s1+crlf); countnum++; } bufout.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); }finally { if(bufin!=null) { try { bufin.close(); } catch (IOException e) { e.printStackTrace(); } } if(bufout!=null) { try { bufout.close(); } catch (IOException e) { e.printStackTrace(); } } } } } 因为很简单,就偷懒了,没有写注释import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.FileNotFoundException;import java.io.FileReader;import java.io.FileWriter;import java.io.IOException;import java.util.Vector;public class FileIOTest { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub String fileName = "D:\\testfile.txt"; String destFile = "D:\\destination.txt"; String strTemp = ""; BufferedReader reader = null; BufferedWriter writer = null; Vector<String> vec = new Vector<String>(); try { reader = new BufferedReader(new FileReader(fileName)); writer = new BufferedWriter(new FileWriter(destFile)); strTemp = reader.readLine(); while (strTemp != null) { vec.add(strTemp); strTemp = reader.readLine(); } reader.close(); for (int i = 0; i < vec.size(); i++) { System.out.println(vec.get(vec.size() -1 - i)); writer.write(i + 1 + vec.get(i)); writer.newLine(); } writer.close(); }catch (FileNotFoundException fe) { fe.printStackTrace(); }catch (IOException ie) { ie.printStackTrace(); } }} 关于组件绘制的问题paintComponent函数 日期取整问题,比如获得今天的日期2010-09-09 00:00:00 怎么办啊,急死了, Oracle是用Java写的吗? instanceof和Object 的两个问题 解释?? SWing问题 小弟想学java,各位大哥给点意见 高分求教:谁能用贪心算法来解决这个问题?在线等待 那里有JB的书可以下栽!给100分一定 [求助]为什么程序不输出run()方法内容? java入门
package zhao;import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Vector;
public class Test
{
public static void main(String args[])
{
Vector<String> v = new Vector<String>();
BufferedReader bufin = null;
BufferedWriter bufout = null;
try {
bufin = new BufferedReader(new FileReader("D:\\eclipse\\test.txt"));
String s = null;
while((s=bufin.readLine()) != null) {
v.add(s);
}
bufin.close();
String [] array = v.toArray(new String[v.size()]);
for(int i=array.length-1;i>=0;i-- ) {
System.out.println(array[i]);
}
bufout = new BufferedWriter(new FileWriter("D:\\eclipse\\testin.txt"));
for(String s1:v) {
bufout.write(s1+"\n");
}
bufout.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}finally {
if(bufin!=null) {
try {
bufin.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if(bufout!=null) {
try {
bufout.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
import java.io.*;
import java.util.*;
public class Test{
public void doSomething(String inFileName,String outFileName) throws IOException{
File inFile = new File(inFileName);
File outFile = new File(outFileName);
BufferedReader br = new BufferedReader(new FileReader(inFile));
BufferedWriter bw = new BufferedWriter(new FileWriter(outFile));
String s = null;
Vector<String> list = new Vector<String>();
while((s = br.readLine()) != null){
list.add(s);
}
br.close();
Collections.reverse(list);
int line = 1;
for(String tmp:list){
System.out.println(tmp);
bw.write((line++) + "\t" + tmp);
bw.newLine();
}
bw.flush();
bw.close();
}
public static void main(String[] args){
try {
new Test().doSomething("C:/in.txt","C:/out.txt");
} catch (IOException e) {
e.printStackTrace();
}
}
}
// 再发一次,刚才行番号没打!
package zhao;import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Vector;
public class Test
{
public static void main(String args[])
{
Vector<String> v = new Vector<String>();
BufferedReader bufin = null;
BufferedWriter bufout = null;
try {
bufin = new BufferedReader(new FileReader("D:\\eclipse\\test.txt"));
String s = null;
while((s=bufin.readLine()) != null) {
v.add(s);
}
bufin.close();
String [] array = v.toArray(new String[v.size()]);
for(int i=array.length-1;i>=0;i-- ) {
System.out.println(array[i]);
}
bufout = new BufferedWriter(new FileWriter("D:\\eclipse\\testin.txt"));
int countnum = 1;
String crlf=System.getProperty("line.separator");
for(String s1:v) {
bufout.write(countnum+": "+s1+crlf);
countnum++;
}
bufout.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}finally {
if(bufin!=null) {
try {
bufin.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if(bufout!=null) {
try {
bufout.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Vector;public class FileIOTest { /**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
String fileName = "D:\\testfile.txt";
String destFile = "D:\\destination.txt";
String strTemp = "";
BufferedReader reader = null;
BufferedWriter writer = null;
Vector<String> vec = new Vector<String>();
try {
reader = new BufferedReader(new FileReader(fileName));
writer = new BufferedWriter(new FileWriter(destFile));
strTemp = reader.readLine();
while (strTemp != null) {
vec.add(strTemp);
strTemp = reader.readLine();
}
reader.close();
for (int i = 0; i < vec.size(); i++) {
System.out.println(vec.get(vec.size() -1 - i));
writer.write(i + 1 + vec.get(i));
writer.newLine();
}
writer.close();
}catch (FileNotFoundException fe) {
fe.printStackTrace();
}catch (IOException ie) {
ie.printStackTrace();
}
}
}