输入一行字符，分别统计出包含英文字母、空格、数字和其它字符的个数。
数据范围：输入的字符串长度满足
[编程题]统计字符
记着ascII码就比较简单了。
import java.util.Scanner;
// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
// 注意 hasNext 和 hasNextLine 的区别
String str = in.nextLine();
int letter = 0;
int space = 0;
int num = 0;
int other = 0;
for(int i=0;i<str.length();i++){
char c = str.charAt(i);
if(c>=65 && c<=90){
letter++;
}
else if(c>=97 && c<=122){
letter++;
}
else if(c == ' ') {
space++;
}
else if(c >=48 && c<=57){
num++;
}
else{
other++;
}
}
System.out.println(letter);
System.out.println(space);
System.out.println(num);
System.out.println(other);
}
}
编辑于 2024-04-24 16:45:08
回复(0)
无脑上:
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
String line = scanner.nextLine();
int letter = 0;
int blank = 0;
int digit = 0;
int other = 0;
char[] chars = line.toCharArray();
for (int i = 0; i < chars.length; i++) {
if (Character.isLetter(chars[i])) {
letter++;
} else if (Character.isDigit(chars[i])) {
digit++;
} else if (chars[i] == ' ') {
blank++;
} else {
other++;
}
}
System.out.println(letter);
System.out.println(blank);
System.out.println(digit);
System.out.println(other);
}
编辑于 2024-04-08 21:47:17
回复(0)
毫无技巧的暴力输出
import java.util.Scanner;
// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
// 注意 hasNext 和 hasNextLine 的区别
String val = in.nextLine();
char[] cs = val.toCharArray();
//字符
int a = 0;
//空格
int b = 0;
//数字
int c = 0;
//其他
int d = 0;
for (char v : cs) {
if (v >= '0' && v <= '9') {
c = c + 1;
} else if (v == ' ') {
b = b + 1;
} else if ((v >= 'a' && v <= 'z') || (v >= 'A' && v <= 'Z') ) {
a = a + 1;
} else {
d = d + 1;
}
}
System.out.println(a);
System.out.println(b);
System.out.println(c);
System.out.println(d);
}
}
编辑于 2024-04-08 12:48:43
回复(0)
import java.util.Scanner;
// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
// 注意 hasNext 和 hasNextLine 的区别
while (in.hasNextLine()) { // 注意 while 处理多个 case
String s = in.nextLine();
int letter = 0;
int blankSpace = 0;
int num = 0;
int other = 0;
for (int i = 0; i < s.length(); i++) {
char c = s.charAt(i);
if (Character.isWhitespace(c)) {
blankSpace++;
} else if (Character.isLetter(c) ) {
letter++;
} else if (Character.isDigit(c)) {
num++;
} else {
other++;
}
}
System.out.println(letter);
System.out.println(blankSpace);
System.out.println(num);
System.out.println(other);
}
}
}
编辑于 2024-01-09 10:04:28
回复(0)
import java.util.*;
// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
char [] arr = in.nextLine().toCharArray();
int [] a = new int[4];
for(int i = 0; i < arr.length; i++){
if(Character.isLetter(arr[i])){
a[0]++;
}else if(arr[i] == ' '){
a[1]++;
}else if(Character.isDigit(arr[i])){
a[2]++;
}else{
a[3]++;
}
}
System.out.println(a[0]+"\n"+a[1]+"\n"+a[2]+"\n"+a[3]);
}
}
发表于 2023-11-24 13:13:59
回复(0)
public class HJ40 {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
// 注意 hasNext 和 hasNextLine 的区别
while (in.hasNextLine()){
String str = in.nextLine();
count(str);
// methodReplace(str);
bytecodeCount(str);
}
}
private static void methodReplace(String str) {
int length = str.length();
String replaced = str.replaceAll("[\\u4E00-\\u9FA5A-Za-z]", "");
System.out.println(length - replaced.length());
length = replaced.length();
replaced = replaced.replaceAll(" ", "");
System.out.println(length - replaced.length());
length = replaced.length();
replaced = replaced.replaceAll("[0-9]", "");
System.out.println(length - replaced.length());
length = replaced.length();
System.out.println(length);
}
private static void count(String str) {
int a = 0, e = 0, n = 0, o = 0;
for (int i = 0; i < str.length(); i++) {
char charred = str.charAt(i);
String item = Character.toString(charred);
if (item.matches("[\\u4E00-\\u9FA5A-Za-z]")) {
a++;
}else if (item.matches("[0-9]")){
n++;
}else if (item.equals(" ")){
e ++;
}else {
o ++;
}
}
System.out.println(a + "\n" + e + "\n" + n + "\n" + o);
}
private static void bytecodeCount(String str) {
int a = 0, e = 0, n = 0, o = 0;
for (int i = 0; i < str.length(); i++) {
char item = str.charAt(i);
//利用 字码表
if((item >= 0x4e00)&&(item <= 0x9fbb) || (item >= 65 && item <= 90) || (item >= 97 && item <= 122)) {
a++;
}else if (item >= 48 && item <= 57){
n++;
}else if (Character.isSpaceChar(item)){
e++;
}else {
o ++;
}
}
System.out.println(a + "\n" + e + "\n" + n + "\n" + o);
}
}
发表于 2023-09-17 00:32:39
回复(0)
import java.util.Scanner;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashMap;
// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
public static void main(String[] args) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String line;
while ((line = br.readLine()) != null) {
// 存储不同字符的次数，可以用双值型数据类型hashMap
HashMap<String, Integer> map = new HashMap<>();
for (int i = 0; i < line.length(); i++) {
char c = line.charAt(i);
if (Character.isLetter(c)) {
String key = "character";
map.put(key, map.getOrDefault(key, 0) + 1);
} else if (c == ' ') {
String key = "space";
map.put(key, map.getOrDefault(key, 0) + 1);
} else if (c >= '0' && c <= '9') {
String key = "digital";
map.put(key, map.getOrDefault(key, 0) + 1);
} else {
String key = "other";
map.put(key, map.getOrDefault(key, 0) + 1);
}
}
System.out.println(map.getOrDefault("character", 0));
System.out.println(map.getOrDefault("space", 0));
System.out.println(map.getOrDefault("digital", 0));
System.out.println(map.getOrDefault("other", 0));
}
}
}
发表于 2023-08-09 11:00:40
回复(0)
import java.util.Scanner;
// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
// 注意 hasNext 和 hasNextLine 的区别
while (in.hasNextLine()) { // 注意 while 处理多个 case
String input = in.nextLine();
funHJ40(input);
}
}
public static void funHJ40(String str) {
System.out.println(str.length() - str.replaceAll("[A-Za-z]", "").length());
System.out.println(str.length() - str.replaceAll("\\s", "").length());
System.out.println(str.length() - str.replaceAll("[0-9]", "").length());
System.out.println(str.length() - str.replaceAll("[^0-9a-zA-Z\\s]",
"").length());
}
}
发表于 2023-06-17 21:29:57
回复(0)
import java.util.Scanner;
// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
String str = in.nextLine();
int eNum = 0;
int sNum = 0;
int mNum = 0;
int oNum = 0;
char[] chars = str.toCharArray();
for (char aChar : chars) {
if((aChar >= 65 && aChar <= 90) || (aChar >= 97 && aChar <= 122)) {
eNum++;
}else if(aChar >= 48 && aChar <= 57) {
mNum++;
}else if(aChar == 32) {
sNum++;
}else oNum++;
}
System.out.println(eNum);
System.out.println(sNum);
System.out.println(mNum);
System.out.println(oNum);
}
}
发表于 2023-06-06 23:11:13
回复(0)
import java.util.Scanner;
// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
String a = in.nextLine();
int num = 0;
int letter = 0;
int kou = 0;
int other = 0;
for (int i = 0; i < a.length(); i++) {
char cha = a.charAt(i);
if (Character.isDigit(cha)) {
num++;
continue;
}
if (Character.isLetter(cha)) {
letter++;
continue;
}
if (Character.isSpaceChar(cha)) {
kou++;
continue;
}
other++;
}
System.out.println(letter);
System.out.println(kou);
System.out.println(num);
System.out.println(other);
}
}
发表于 2023-05-30 16:44:54
回复(0)
import java.util.Scanner;
// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
// 注意 hasNext 和 hasNextLine 的区别
String str=in.nextLine();
int c=0;
int space=0;
int math=0;
int other=0;
for(int i=0;i<str.length();i++){
if(Character.isLetter(str.charAt(i))){
c++;
}else if(Character.isDigit(str.charAt(i))){
math++;
}else if(Character.isSpace(str.charAt(i))){
space++;
}else{
other++;
}
}
System.out.println(c);
System.out.println(space);
System.out.println(math);
System.out.println(other);
}
}
发表于 2023-05-28 15:18:27
回复(0)
import java.util.Scanner;
// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
String str = in.nextLine();
int total_lenth = str.length();
str = str.replaceAll("[a-zA-Z]", "");
System.out.println(total_lenth-str.length());//英文
String str1 = str.replaceAll("\\s", "");
System.out.println(str.length()-str1.length());//空格
String str2 = str1.replaceAll("[0-9]", "");
System.out.println(str1.length()-str2.length());//数字
System.out.println(str2.length());//其他
}
}
发表于 2023-03-29 17:09:08
回复(0)
\
import java.util.Scanner;
// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
// 注意 hasNext 和 hasNextLine 的区别
while (in.hasNextLine()) { // 注意 while 处理多个 case
String str=in.nextLine();
int a=str.length()-str.replaceAll("[a-zA-Z]","").length();
int b=str.length()-str.replaceAll(" ","").length();
int c=str.length()-str.replaceAll("[0-9]","").length();
int d=str.length()-a-b-c;
System.out.println(a);
System.out.println(b);
System.out.println(c);
System.out.println(d);
}
}
}
发表于 2023-03-05 16:31:35
回复(0)
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
String str = sc.nextLine();
int i = 0, j = 0, m = 0, n = 0;
for (char c : str.toCharArray()) {
if (Character.isLetter(c)) {
i++;
} else if (' ' == c) {
j++;
} else if (c >= '0' && c <= '9') {
m++;
} else {
n++;
}
}
System.out.println(i);
System.out.println(j);
System.out.println(m);
System.out.println(n);
}
}
发表于 2023-02-22 08:42:35
回复(0)
用 match 做
import java.util.Scanner;
// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
// 注意 hasNext 和 hasNextLine 的区别
String s=in.nextLine();
int count1=0;
int count2=0;
int count3=0;
int count4=0;
for(int i=0; i<s.length();i++){
String temp=s.charAt(i)+"";
if(temp.matches("[a-zA-Z]")){
count1++;
}
else if(temp.matches(" ")){count2++;}
else if(temp.matches("[0-9]")){count3++;}
else{count4++;}
}
System.out.println(count1);
System.out.println(count2);
System.out.println(count3);
System.out.println(count4);
}
}
发表于 2023-02-17 21:19:51
回复(0)
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class Main {
public static void main(String[] args) throws Exception {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String line = br.readLine();
int[] count = new int[4];
for(int i = 0;i < line.length();i++){
char ch = line.charAt(i);
if(Character.isLetter(ch)){
count[0]++;
}else if(ch == ' '){
count[1]++;
}else if(Character.isDigit(ch)){
count[2]++;
}else{
count[3]++;
}
}
for(int i = 0;i < 4;i++){
System.out.println(count[i]);
}
}
}
发表于 2022-08-12 15:47:58
回复(0)
import java.util.*;
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
while (scanner.hasNext()) {
//获取字符串
String str = scanner.nextLine();
char[] chs=str.toCharArray();
int letterNum=0;
int blankNum=0;
int digitalNum=0;
int othersNum=0;
for (int i = 0; i < str.length(); i++) {
if (Character.isLetter(chs[i])) {
letterNum++;
continue;
}
if (Character.isDigit(chs[i])) {
digitalNum++;
continue;
}
if (Character.isWhitespace(chs[i])) {
blankNum++;
continue;
}
othersNum++;
}
System.out.println(letterNum);
System.out.println(blankNum);
System.out.println(digitalNum);
System.out.println(othersNum);
}
scanner.close();
}
}
发表于 2022-08-11 19:22:21
回复(0)
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.*;
public class Main {
public static void main(String[] args) throws Exception {
/*BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String line = null;*/
Scanner scanner = new Scanner(System.in);
while(scanner.hasNext()){
char[] toSum = scanner.nextLine().toCharArray();
int isEnglishChar = 0;
int isSpaceChar = 0;
int isDigitChar = 0;
int isSpecialChar = 0;
for(int i = 0;i < toSum.length;i++){
if(Character.isLetter(toSum[i])){
isEnglishChar++;
}else if(toSum[i] == ' '){
isSpaceChar++;
}else if(Character.isDigit(toSum[i])){
isDigitChar++;
}else{
isSpecialChar++;
}
}
System.out.println(isEnglishChar);
System.out.println(isSpaceChar);
System.out.println(isDigitChar);
System.out.println(isSpecialChar);
}
}
}
发表于 2022-07-29 16:14:37
回复(0)
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
String s = sc.nextLine();
int a = 0, b = 0, c =0, d = 0;
for (int i = 0; i < s.length(); i++) {
char ch = s.charAt(i);
if (Character.isLetter(ch)) {
a++;
} else if (ch == ' ') {
b++;
} else if (Character.isDigit(ch)) {
c++;
} else {
d++;
}
}
System.out.println(a);
System.out.println(b);
System.out.println(c);
System.out.println(d);
}
}
发表于 2022-07-07 14:22:35
回复(0)
问题信息
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