Java中的字符和字符串输入
我是Java新手,为不同数据类型的基本I/O操作编写了一个程序。我想让程序输入1 a abcd
,然后分别在三行中输出它们。但是当我输入1 a
时,程序终止并输出1
、a
和三行中的空行。我无法正确输入字符,我认为这是问题的根源。
有人能告诉我哪里弄错了吗
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.Scanner;
import java.util.StringTokenizer;
public class Main {
static class FastReader {
BufferedReader br;
StringTokenizer st;
public FastReader() {
br = new BufferedReader(new InputStreamReader(System.in));
}
String next() {
while (st == null || !st.hasMoreElements()) {
try {
st = new StringTokenizer(br.readLine());
}
catch (IOException e) {
e.printStackTrace();
}
}
return st.nextToken();
}
int nextInt() {
return Integer.parseInt(next());
}
long nextLong() {
return Long.parseLong(next());
}
double nextDouble() {
return Double.parseDouble(next());
}
char nextChar() {
char c = ' ';
try {
c = (char)br.read();
}
catch (IOException e) {
e.printStackTrace();
}
return c;
}
String nextLine() {
String str = "";
try {
str = br.readLine();
}
catch (IOException e) {
e.printStackTrace();
}
return str;
}
}
public static void main(String[] args) {
FastReader in = new FastReader();
PrintWriter out = new PrintWriter(System.out);
int n = in.nextInt();
char c = in.nextChar();
String s = in.nextLine();
out.println(n);
out.println(c);
out.println(s);
out.close();
}
}
# 1 楼答案
重构代码,如下所示
输出:
# 2 楼答案
你的意思是像下面这样:
您引用此代码: