//把c赋一个初值
import java.io.*; public class SimpleCharInOut
{
public static void main(String args[])
{
char c=' ';
System.out.print("Enter a character please:");
try{
c=(char)System.in.read();
}catch(IOException e){};
System.out.println("You have entered character"+c);
} }
import java.io.*; public class SimpleCharInOut
{
public static void main(String args[])
{
char c=' ';
System.out.print("Enter a character please:");
try{
c=(char)System.in.read();
}catch(IOException e){};
System.out.println("You have entered character"+c);
} }
{
public static void main(String args[])
{
char c=' '; //这里把他初始化就好了
System.out.print("Enter a character please:");
try{
c=(char)System.in.read();
}catch(IOException e){};
System.out.println("You have entered character"+c);
}
}