编写java程序:输入一个字符串,判断有几个英文字母,有几个数字,有几个其它的字符 用java编写一个程序,接收用户输入的字符串,输出其中英文字...
Java\u7f16\u7a0b\uff1a \u7528\u6237\u8f93\u5165\u4e00\u4e2a\u5b57\u7b26\u4e32\uff0c\u5224\u65ad\u6709\u51e0\u4e2a\u82f1\u6587\u5b57\u6bcd\uff0c\u6709\u51e0\u4e2a\u6570\u5b57\uff0c\u6709\u51e0\u4e2a\u5176\u5b83\u7684\u5b57\u7b26\u3002\u521d\u59cb\u5316\u4e09\u4e2a\u4e3a0\u7684\u53d8\u91cf \u5206\u522b\u4ee3\u8868\u5b57\u6bcd\u3001\u6570\u5b57\u3001\u5176\u4ed6\u5b57\u7b26\u7684\u6570\u91cf \u5faa\u73af\u904d\u5386\u6bcf\u4e2a\u5b57\u7b26\u4e32\u4e2d\u7684\u5b57\u7b26 \u4f9d\u6b21\u5224\u65ad \u5b57\u6bcd\u7684\u8bdd\u5b57\u6bcd\u90a3\u4e2a\u53d8\u91cf++ \u3002\u3002\u3002\u5176\u4ed6\u540c\u7406
importjava.util.Scanner;publicclassA04{publicstaticvoidmain(Stringargs[]){System.out.println("\u8bf7\u8f93\u5165\u5b57\u7b26\u4e32\uff1a");Strings=newScanner(System.in).next();System.out.println("\u8f93\u51fa\u7ed3\u679c\uff1a");for(charc:s.toCharArray()){if(c>='a'&&c='A'&&c<='Z'){c+=32;}System.out.print(c);}}}
public class Main {public static void main(String args[]){
String str1="abfdTE1879!!";//可以从控制台输入
String str2=str1.replaceAll("[a-z|A-Z]","");
System.out.println("英文字符的个数为"+(str1.length()-str2.length()));
str1=str2;
str2=str1.replaceAll("[0-9]","");
System.out.println("数字字符的个数为"+(str1.length()-str2.length()));
System.out.println("其它字符的个数为"+str2.length());
}
}
这是最简洁的
运行示例：
英文字符的个数为6
数字字符的个数为4
其它字符的个数为2
public static void main(String[] args) {
int count_abc=0,count_num=0,count_oth=0;
//输入一串数
Scanner scan=new Scanner(System.in);
String str = scan.next();
char[] chars = str.toCharArray();
//判断每个字符
for(int i = 0;i<chars.length;i++){
if((chars[i]>=65&&chars[i]<=90)||(chars[i]>=97&&chars[i]<=122)){
count_abc++;
}else if(chars[i]>=48&&chars[i]<=57){
count_num++;
}else{
count_oth++;
}
}
System.out.println("字母有："+count_abc+"个");
System.out.println("数字有："+count_num+"个");
System.out.println("其他的有："+count_oth+"个");
}
public static void main(String[] args) {
// TODO Auto-generated method stub
int abcCount=0;//英文字母个数
int spaceCount=0;//空格键个数
int numCount=0;//数字个数
int otherCount=0;//其他字符个数
Scanner scan=new Scanner(System.in);
String str=scan.nextLine();
char[] ch = str.toCharArray();
for(int i=0;i<ch.length;i++){
if(Character.isLetter(ch[i])){
//判断是否字母
abcCount++;
}
else if(Character.isDigit(ch[i])){
//判断是否数字
numCount++;
}
else if(Character.isSpaceChar(ch[i])){
//判断是否空格键
spaceCount++;
}
else{
//以上都不是则认为是其他字符
otherCount++;
}
}
System.out.println("字母个数："+abcCount);
System.out.println("数字个数："+numCount);
System.out.println("空格个数："+spaceCount);
System.out.println("其他字符个数："+otherCount);
}
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner scan = new Scanner(System.in);
String getMess=scan.nextLine();
int zm=0;
int num=0;
int other=0;
char [] ch = getMess.toCharArray();
for(int i=0;i<ch.length;i++){
if((ch[i]>='a' && ch[i]<='z') || (ch[i]>='A' && ch[i]<='Z')){
zm=zm+1;
}else if(ch[i]>47 && ch[i]<58){
num=num+1;
}else{
other=other+1;
}
}
System.out.println("字母："+zm);
System.out.println("数字："+num);
System.out.println("其它："+other);
}
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