您所在位置：主题：((line = br.readLine().trim())!=null异常
tgnian
[专家分：100] 发布于 2008-08-05 20:59:00
while ((line = br.readLine())!=null)
{
line = line.trim();
}
运行没问题
但改为
while ((line = br.readLine().trim())!=null)
{
//line = line.trim();
}
为什么就有异常？
Exception in thread "main" java.lang.NullPointerException
at CodeCounter.parse(CodeCounter.java:40)
at CodeCounter.main(CodeCounter.java:22)
{
line = line.trim();
}
运行没问题
但改为
while ((line = br.readLine().trim())!=null)
{
//line = line.trim();
}
为什么就有异常？
Exception in thread "main" java.lang.NullPointerException
at CodeCounter.parse(CodeCounter.java:40)
at CodeCounter.main(CodeCounter.java:22)
