我对Java很陌生,所以我想创建一个简单的程序,它会要求我输入一些随机值,然后打印它。问题是当我输入数字 1,输出为 51,输入 3-输出 51,输入 77-输出 55。这有什么问题?代码如下所示:
public static void main(String[] args) throws IOException
{
System.out.print("Input:");
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
int val=br.read();
System.out.print("Output:");
System.out.println(val);
}
你只需读取一个字符并打印 unicode :)
尝试类似的东西
String s=br.readLine();
System.out.print("Output:");
System.out.println("Input " + s);
int val = Integer.parseInt(s):
System.out.println("As integer: " + val);
如果您只想读取单个字符:
System.out.print("Input:");
Reader r = new new InputStreamReader(System.in);
int val = r.read();
System.out.print("Output:");
System.out.println((char) val);
如果要读取一位数字:
System.out.print("Input:");
Reader r = new new InputStreamReader(System.in);
int val = r.read() - '0';
System.out.print("Output:");
if (val < 0 || val > 9) {
System.out.println("error, digit expected");
} else {
System.out.println(val);
}
您也可以将 BufferedReader 用作
public static void main(String[] args) {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
String input = reader.readLine();
input number = Integer.parseInt(input);
System.out.println(input);
}