1、简单粗暴哈希表
import javafx.collections.MapChangeListener;
import javax.persistence.criteria.CriteriaBuilder;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.math.BigInteger;
import java.util.*;
public class Main
{
static PrintWriter pw = new PrintWriter(new BufferedWriter(new OutputStreamWriter(System.out)));
static int N = (int)200;
static Map<Character, Integer> map = new HashMap<>();
static char str[] = new char[N];
// 将A~Z映射成1~26
static void reflect()
{
String s = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
str = s.toCharArray();
for(int i = 0 ; i < str.length ; i ++) map.put(str[i],i + 1);
}
public static void main(String[] args ) throws IOException
{
reflect();
for(int i = 0 ; i < map.size() ; i ++) pw.println(str[i] + " " + map.get(str[i]));
pw.flush();
}
}
class rd
{
static BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
static StringTokenizer tokenizer = new StringTokenizer("");
static String nextLine() throws IOException { return reader.readLine(); }
static String next() throws IOException
{
while (!tokenizer.hasMoreTokens()) tokenizer = new StringTokenizer(reader.readLine());
return tokenizer.nextToken();
}
static int nextInt() throws IOException { return Integer.parseInt(next()); }
static double nextDouble() throws IOException { return Double.parseDouble(next()); }
static long nextLong() throws IOException { return Long.parseLong(next());}
static BigInteger nextBigInteger() throws IOException
{
BigInteger d = new BigInteger(rd.nextLine());
return d;
}
}
class PII
{
int x,y;
public PII(int x ,int y)
{
this.x = x;
this.y = y;
}
}
2、字符减法构造
import javafx.collections.MapChangeListener;
import javax.persistence.criteria.CriteriaBuilder;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.math.BigInteger;
import java.util.*;
public class Main
{
static PrintWriter pw = new PrintWriter(new BufferedWriter(new OutputStreamWriter(System.out)));
static int N = (int)200;
public static void main(String[] args ) throws IOException
{
String s = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
char str[] = s.toCharArray();
for(int i = 0 ; i < str.length ; i ++) pw.println( str[i] + " " + (str[i] - 'A' + 1) );
pw.flush();
}
}
class rd
{
static BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
static StringTokenizer tokenizer = new StringTokenizer("");
static String nextLine() throws IOException { return reader.readLine(); }
static String next() throws IOException
{
while (!tokenizer.hasMoreTokens()) tokenizer = new StringTokenizer(reader.readLine());
return tokenizer.nextToken();
}
static int nextInt() throws IOException { return Integer.parseInt(next()); }
static double nextDouble() throws IOException { return Double.parseDouble(next()); }
static long nextLong() throws IOException { return Long.parseLong(next());}
static BigInteger nextBigInteger() throws IOException
{
BigInteger d = new BigInteger(rd.nextLine());
return d;
}
}
class PII
{
int x,y;
public PII(int x ,int y)
{
this.x = x;
this.y = y;
}
}