编了个java小程序，关于FileInputStream流的，但编译的时候显示变量找不到，求教！

Question

import java.io.*;
public class TestFileInputStream {
public static void main(String []args) {
try {
FileInputStream stream =null;
stream = new FileInputStream("E:/javadocument/Stream/TestFileInputStream.java");
} catch (FileNotFoundException e) {
System.out.println("wenjianmingmeizhaodao");
System.exit(-1);
}

  long num = 0;
  int b; 
  try {
     while((b = stream.read()) != -1) {
        System.out.print((char)b);
        num++; 
     }
     stream.close();
     System.out.println();
     System.out.println(num);
  } catch (IOException e) {
     System.out.println("fashengcuowu");
     System.exit(-1);
  }

}
}

编译时总是显示变量stream找不到符号，为什么？

Answer 1

你的变量定义在 try 里边了是局部变量了 下边当然取不到了