代码入下:
复制代码代码如下:
import java.io.*;
public class Practice {
public static void main(String[] args) {
// TODO Auto-generated method stub
BufferedReader buf;
buf=new BufferedReader(new InputStreamReader(System.in));
try
{
String str=buf.readLine();
for(int i=0;i<str.length();i++){
char ch = str.charAt(i);
//System.out.println(ch);
if(!Character.isLetter(ch))
{
System.out.println("此字符不是字母");
}
else if(Character.isLetter(ch))
{
if (!Character.isLowerCase(ch))
{
System.out.println("此字符是大写字母");
}
else if (Character.isLowerCase(ch))
{
System.out.println("此字符是小写字母");
}
}
}
}
catch(Exception e)
{
}
}
}
效果如图所示: