Java开发网 - System.in.read()输入int后print怎么变了?

Topic: System.in.read()输入int后print怎么变了?

1.System.in.read()输入int后print怎么变了?

Posted by: netfsy
Posted on: 2004-12-09 10:24

class readtext
{
  public static void main(String args[])
  {
    int ch;
    ch=1;
    System.out.println("Enter a number:");
    try
    {
      ch=System.in.read();
      }
    catch(Exception e)
    {
      System.out.println("Cannot read:"+ch);
      }
    System.out.println("The nember is:"+ch);输出的总是其他的数字
    System.out.println("The character is:"+(char)ch);输出的是我输入的数字,该是字符吧
    }
  }

2.Re:System.in.read()输入int后print怎么变了? [Re: netfsy]	Copy to clipboard
Posted by: netfsy Posted on: 2004-12-09 10:56 补充一下:和系统没关系吧,偶是xp的系统各位大虾帮帮忙啦,先谢了~

3.Re:System.in.read()输入int后print怎么变了? [Re: netfsy]	Copy to clipboard
Posted by: vainglory Posted on: 2004-12-09 16:41 System.in.read();返回的是字符吧，比如‘1’是49，‘a’是97

4.Re:System.in.read()输入int后print怎么变了? [Re: netfsy]	Copy to clipboard
Posted by: netfsy Posted on: 2004-12-10 15:03 是的是的,就是这个样子. 但int i=System.in.read();怎么会是字符呢?read()里写入int也是错的,该在哪里限制一下呢?

5.Re:System.in.read()输入int后print怎么变了? [Re: netfsy]	Copy to clipboard
Posted by: ch_tj2k Posted on: 2004-12-10 17:30 System.in.read()只能读一个输入的字符，函数返回值类型是byte。

6.Re:System.in.read()输入int后print怎么变了? [Re: netfsy]	Copy to clipboard
Posted by: plam Posted on: 2004-12-11 18:53 int i = Integer.parseInt(in.readLine());