//=============================读文件package fier;import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStreamReader;public class Sdsd {/**
* @param args
*/public static void main(String[] args) {
read("E:\\123.txt");
}public static void read(String file) {
String s = null;
StringBuffer sb = new StringBuffer();
File f = new File(file);
if (f.exists()) {
System.out.println("文件存在"); try {
BufferedReader br = new BufferedReader(new InputStreamReader(
new FileInputStream(f))); while ((s = br.readLine()) != null) {
sb.append(s);
}
System.out.println(sb);
} catch (Exception e) {
e.printStackTrace();
}
}else{
System.out.println("文件不存在!");
}
}
}
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStreamReader;public class Sdsd {/**
* @param args
*/public static void main(String[] args) {
read("E:\\123.txt");
}public static void read(String file) {
String s = null;
StringBuffer sb = new StringBuffer();
File f = new File(file);
if (f.exists()) {
System.out.println("文件存在"); try {
BufferedReader br = new BufferedReader(new InputStreamReader(
new FileInputStream(f))); while ((s = br.readLine()) != null) {
sb.append(s);
}
System.out.println(sb);
} catch (Exception e) {
e.printStackTrace();
}
}else{
System.out.println("文件不存在!");
}
}
}
编译完成后输入java Sdsd运行他就行了
F:\>java Sdsd
Exception in thread "main" java.lang.NoClassDefFoundError: SdsdF:\>
你看看F盘下有Sdsd.class文件吗