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import java.io.*; public class KeyboardInput{ private final BufferedReader in=new BufferedReader(new InputStreamReader(System.in)); public final synchronized int readInteger(){ String input=""; int value=0; try{ input=in.readLine(); } catch (IOException e){} if(input!=null){ try{ value=Integer.parseInt(input); } catch(NumberFormatException e){} } return value; } public final synchronized long readLong(){ String input=""; long value=0L; try{ input=in.readLine(); } catch (IOException e){} if(input!=null){ try{ value=Long.parseLong(input); } catch(NumberFormatException e){} } return value; } public final synchronized double readDouble(){ String input=""; double value=0.0D; try{ input=in.readLine(); } catch (IOException e){} if(input!=null){ try{ value=Double.parseDouble(input); } catch(NumberFormatException e){} } return value; } public final synchronized float readFloat(){ String input=""; float value=0.0F; try{ input=in.readLine(); } catch (IOException e){} if(input!=null){ try{ value=Float.parseFloat(input); } catch(NumberFormatException e){} } return value; } public final synchronized char readCharacter(){ char c=; try{ c=(char)in.read(); } catch (IOException e){} return c; } public final synchronized String readString(){ String s=""; try{ s=in.readLine(); } catch (IOException e){} if(s==null){ s=""; } return s; } } <淘宝热门商品：

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