API

toCharArray()將字符串轉(zhuǎn)換為字符數(shù)組

indexOf()	返回指定字符在字符串中第一次出現(xiàn)處的索引，如果此字符串中沒有這樣的字符，則返回 -1
put()	返回值：當(dāng)存在這個(gè)key的時(shí)候,會覆蓋掉原來的value并返回oldvalue,也就是舊值

import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.util.HashMap; import java.util.Map;public class Main {public static void main(String[] args) throws IOException {BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));char[] a = bf.readLine().toCharArray();char[] b = bf.readLine().toCharArray();char[] c = bf.readLine().toCharArray();char[] d = bf.readLine().toCharArray();StringBuilder sb = new StringBuilder("");//存放結(jié)果的變量String hour = "0123456789ABCDEFGHIJKLMN";//小時(shí)的字符int count = 0;//計(jì)數(shù)for (int i = 0; i < (a.length < b.length ? a.length : b.length); i++) {if (count == 0) {//第一個(gè)if (a[i] >= 'A' && a[i] <= 'G' && a[i] == b[i]) {//符合A到G并且相等sb.append(a[i] + " ");count++;}} else if (count == 1) {//第二個(gè)if (hour.indexOf(a[i]) != -1 && a[i] == b[i]) {//符合有效字符并且相等sb.append(a[i] + " ");break;}}}for (int i = 0; i < (c.length < d.length ? c.length : d.length); i++) {//循環(huán)兩個(gè)字符串，循環(huán)次數(shù)為較小的數(shù)組長度if (((c[i] > 64 && c[i] < 91) || (c[i] > 96 && c[i] < 123)) && c[i] == d[i]) {//是字母并且相等sb.append(i);break;}}Map<String, String> week = new HashMap<String, String>();//存放周的mapweek.put("A", "MON ");week.put("B", "TUE ");week.put("C", "WED ");week.put("D", "THU ");week.put("E", "FRI ");week.put("F", "SAT ");week.put("G", "SUN ");String[] buf = sb.toString().split(" ");System.out.println(week.get(buf[0])//根據(jù)答案輸出周幾+ String.format("%02d", hour.indexOf(buf[1])) + ":"//格式化輸出時(shí)間+ String.format("%02d", Integer.parseInt(buf[2])));} }

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import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader;public class Main {public static void main(String[] args) throws IOException {// TODO Auto-generated method stubBufferedReader bf = new BufferedReader(new InputStreamReader(System.in));String one = bf.readLine();String two = bf.readLine();String three = bf.readLine();String four = bf.readLine();boolean isDay = false;boolean isHour = false;for (int i = 0; i < one.length() && i < two.length(); i++) {if (one.charAt(i) == two.charAt(i)) {if (((one.charAt(i) >= 'A' && one.charAt(i) <= 'N') || Character.isDigit(one.charAt(i))) && !isHour&& isDay) {isHour = true;if (one.charAt(i) >= '0' && one.charAt(i) <= '9') {System.out.print("0" + one.charAt(i));} else {System.out.print(one.charAt(i) - 'A' + 10);}}if (one.charAt(i) >= 'A' && one.charAt(i) <= 'G' && !isDay) {isDay = true;switch (one.charAt(i)) {case 'A':System.out.print("MON ");break;case 'B':System.out.print("TUE ");break;case 'C':System.out.print("WED ");break;case 'D':System.out.print("THU ");break;case 'E':System.out.print("FRI ");break;case 'F':System.out.print("SAT ");break;case 'G':System.out.print("SUN ");break;}}}}for (int i = 0; i < three.length() && i < four.length(); i++) {if ((Character.isUpperCase(three.charAt(i)) || Character.isLowerCase(three.charAt(i)))&& three.charAt(i) == four.charAt(i)) {System.out.printf(":%02d", i);}}} }

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