北大acm 1002 求救
网上提供的java源代码 1002题
import java.io.BufferedInputStream;
import java.io.DataInputStream;
import java.io.IOException;
import java.util.Iterator;
import java.util.Map;
import java.util.Scanner;
import java.util.Set;
import java.util.TreeMap;
public class Main {

public static char getNum(char c) {
if (Character.isDigit(c)) {
return c;
}
if (c == 'A' || c == 'B' || c == 'C') {
return '2';
}
if (c == 'D' || c == 'E' || c == 'F') {
return '3';
}
if (c == 'G' || c == 'H' || c == 'I') {
return '4';
}
if (c == 'J' || c == 'K' || c == 'L') {
return '5';
}
if (c == 'M' || c == 'N' || c == 'O') {
return '6';
}
if (c == 'P' || c == 'R' || c == 'S') {
return '7';
}
if (c == 'T' || c == 'U' || c == 'V') {
return '8';
}
if (c == 'W' || c == 'X' || c == 'Y') {
return '9';
}
return '#';
}

public static void main(String[] args) throws IOException {
DataInputStream scan = new DataInputStream(new BufferedInputStream(System.in));
Map< String, Integer> tm = new TreeMap();
int n = Integer.parseInt(scan.readLine().trim());
for (int i = 0; i < n; i++) {
String s = scan.readLine().replace("-", "");
StringBuilder sb = new StringBuilder();
for (int k = 0; k < s.length(); k++) {
char c = getNum(s.charAt(k));
if (Character.isDigit(c)) {
sb.append(c);
}
}
String result = sb.toString().substring(0, 3) + '-' + sb.toString().substring(3);
if (tm.containsKey(result)) {
int count = tm.get(result) + 1;
tm.put(result, count);
} else {
tm.put(result, 1);
}
}
Set se = tm.keySet();
Iterator it = se.iterator();
boolean flag = false;
while (it.hasNext()) {
String s = it.next().toString();
int count = tm.get(s);
if (count > 1) {
flag = true;
System.out.println(s + " " + count);
}
}
if (!flag) {
System.out.println("No duplicates. ");
}
}
}
编译提示出错
DataInputStream scan = new DataInputStream(new BufferedInputStream(System.in));
此类 在jdk5.0中已经被弃用 敢问高手怎么修改才好

[解决办法]

Java code

import java.io.IOException;import java.util.Iterator;import java.util.Map;import java.util.Scanner;import java.util.Set;import java.util.TreeMap;public class acm1002 {    public static char getNum(char c) {        if (Character.isDigit(c)) {            return c;        }        if (c == 'A' || c == 'B' || c == 'C') {            return '2';        }        if (c == 'D' || c == 'E' || c == 'F') {            return '3';        }        if (c == 'G' || c == 'H' || c == 'I') {            return '4';        }        if (c == 'J' || c == 'K' || c == 'L') {            return '5';        }        if (c == 'M' || c == 'N' || c == 'O') {            return '6';        }        if (c == 'P' || c == 'R' || c == 'S') {            return '7';        }        if (c == 'T' || c == 'U' || c == 'V') {            return '8';        }        if (c == 'W' || c == 'X' || c == 'Y') {            return '9';        }        return '#';    }    public static void main(String[] args) throws IOException {//修改的开始        Scanner reader = new Scanner(System.in);        Map<String, Integer> tm = new TreeMap();        int n = Integer.parseInt(reader.next().trim());        for (int i = 0; i < n; i++) {            String s = reader.next().replace("-", "");            //修改的结束            StringBuilder sb = new StringBuilder();            for (int k = 0; k < s.length(); k++) {                char c = getNum(s.charAt(k));                if (Character.isDigit(c)) {                    sb.append(c);                }            }            String result = sb.toString().substring(0, 3) + '-' + sb.toString().substring(3);            if (tm.containsKey(result)) {                int count = tm.get(result) + 1;                tm.put(result, count);            } else {                tm.put(result, 1);            }        }        Set se = tm.keySet();        Iterator it = se.iterator();        boolean flag = false;        while (it.hasNext()) {            String s = it.next().toString();            int count = tm.get(s);            if (count > 1) {                flag = true;                System.out.println(s + " " + count);            }        }        if (!flag) {            System.out.println("No duplicates. ");        }    }}