用JAVA编程用一个数组来存放一个16进制数,并将该16进制数转换为二进制后存入该数组中,最后输出.

//16进制转二进制
public static void main(String[] args)
{
String hexString = "ABCD";
System.out.println(hexString2binaryString(hexString));
}

public static String hexString2binaryString(String hexString)
{
if (hexString == null || hexString.length() % 2 != 0)
return null;
String bString = "", tmp;
for (int i = 0; i < hexString.length(); i++)
{
tmp = "0000"
+ Integer.toBinaryString(Integer.parseInt(hexString
.substring(i, i + 1), 16));
bString += tmp.substring(tmp.length() - 4);
}
return bString;
}

你说数组只有 1个元素。那改成String[]={}