有那位用java写过读取com口的程序（就是银行取钱的时候用密码键盘输入的那种）谢谢！

[sandsworlf]

如题！
能够读取密码键盘输入的数据，谢谢!

[fpwang]

up

[tianya2002]

看不明白，有没有注示呀

[okwuzhijun]

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;
import java.lang.NumberFormatException;

public class StandardInputReader extends BufferedReader {

/**
* Constructs a new input stream with the specified standard input stream
*/
public StandardInputReader() {
super(new InputStreamReader(System.in));
}

/**
* Read a boolean value from standard input stream.
*
* @return a boolean value.
* @throws IOException
*/
public boolean readBoolean() throws IOException {
String strBoolean = super.readLine();

if (strBoolean.equalsIgnoreCase("true")) {
return true;
} else if (strBoolean.equalsIgnoreCase("false")) {
return false;
} else {
throw new NumberFormatException("For input string: \""
+ strBoolean +"\"");
}
}

/**
* Read a byte value from standard input stream.
*
* @return a byte value.
* @throws IOException
*/
public byte readByte() throws IOException {
return Byte.parseByte(super.readLine());
}

/**
* Read a short value from standard input stream.
*
* @return a short value.
* @throws IOException
*/
public short readShort() throws IOException {
return Short.parseShort(super.readLine());
}

/**
* Read a int value from standard input stream.
*
* @return a int value.
* @throws IOException
*/
public int readInt() throws IOException {
return Integer.parseInt(super.readLine());
}

/**
* Read a long value from standard input stream.
*
* @return a long value.
* @throws IOException
*/
public long readLong() throws IOException {
return Long.parseLong(super.readLine());
}

/**
* Read a float value from standard input stream.
*
* @return a float value.
* @throws IOException
*/
public float readFloat() throws IOException {
return Float.parseFloat(super.readLine());
}

/**
* Read a double value from standard input stream.
*
* @return a double value.
* @throws IOException
*/
public double readDouble() throws IOException {
return Double.parseDouble(super.readLine());
}
}

[chaojinn]

首先到http://java.sun.com上下载JCommunication API(JCOMM)包.
里面有相应的例子。很好懂的。
使用时注意设置路径等问题（具体看readme吧，这一点很重要，我用的时候就在这里卡住过）。

[iamok]

推荐jacob

[zy20001_2001]

跟着学习一下

[highreport]

up

[cxyPioneer]

up

[sandsworlf]

怎么能够让密码键盘能够输入数据，也就是要驱动它，我以前没有用过这个东西，希望哪位老大用过帮帮我，谢谢！