public class Copy3{
public static void main(String args[])
{
InputStream is = System.in; //获取键盘输入字符,InputStream是什么,
//^执行时箭头指向I,报错信息是 cannot resolve symbol
try
{
int c = is.read();
System.out.println( (char)c+""+(char)c+(char)c ); //输出三个字符
}
catch (IOException ex)
//^执行时箭头指向I,报错信息是 cannot resolve symbol