Java编程统计用户从键盘输入的字符串中所包含的字母,数字和其他字符的个数。 不要写的太难，初学者水平！ 在JAVA中,编程统计用户从键盘输入的字符串中所包含的字母、...
\u7528java\u7f16\u7a0b\u7edf\u8ba1\u7528\u6237\u4ece\u952e\u76d8\u8f93\u5165\u7684\u5b57\u7b26\u4e32\u4e2d\u6240\u5305\u542b\u7684\u5b57\u6bcd,\u6570\u5b57\u548c\u5176\u4ed6\u5b57\u7b26\u4e32\u7684\u4e2a\u6570?import java.util.Scanner;public class Test { public static void main(String [] args){ Scanner input = new Scanner(System.in); System.out.print("\u8f93\u5165\u5b57\u7b26\u4e32\uff1a"); String strs = input.next(); int number = 0; int chara = 0; int other = 0; char [] chs = strs.toCharArray(); for(char c : chs){ if(c >= '0' && c = 'a' && c = 'A' && c <= 'Z' ){ chara++; }else{ other++; } } System.out.println("\u6570\u5b57\u6709:" + number + "\u4e2a\uff0c\u5b57\u7b26\u6709" + chara + "\u4e2a\uff0c\u5176\u4ed6\u6709\uff1a" + other + "\u4e2a\u3002" ); }}
\u544a\u8bc9\u4f60\u4e00\u4e2a\u601d\u8def\uff0c\u8bbe\u5b9a\u4e09\u4e2a\u53d8\u91cf\uff0c\u5206\u522b\u4ee3\u8868\u6570\u5b57\uff0c\u5b57\u6bcd\uff0c\u5176\u4ed6\u5b57\u7b26\u3002\u7528\u8f93\u5165\u6d41\u3002\u6bcf\u8f93\u5165\u4e00\u4e2a\u5b57\u7b26\uff0c\u5224\u65ad\u8fd9\u4e2a\u5b57\u7b26\u7684asc\u7801\uff0c\u5728\u591a\u5c11\u5230\u591a\u5c11\u4e4b\u95f4\u662f\u5b57\u6bcd\uff0c\u591a\u5c11\u5230\u591a\u5c11\u662f\u6570\u5b57\u3002\u6bcf\u6b21\u5224\u65ad\u4e00\u4e2a\uff0c\u5bf9\u5e94\u7684\u53d8\u91cf+1\uff0c\u6700\u540e\u5206\u522b\u8f93\u51fa\u53d8\u91cf
import java.util.Scanner;
/**
* 统计字符串中数字,字母,空格,其他字符的个数
* @author Administrator
*
*/
public class Data01 {
public static void main(String[] args) {
int englishCount = 0;// 英文字母个数
int spaceCount = 0;// 空格个数
int numCount = 0;// 数字个数
int otherCount = 0;// 其他字符个数
Scanner sc = new Scanner(System.in);
System.out.println("请您输入一行字符：");
String str = sc.nextLine();// 取得控制台输入的一行字符
char[] ch = str.toCharArray();// 把取道的字符串变成一个char数组
for (int i = 0; i < ch.length; i++) {
if (Character.isLetter(ch[i])) {
// 判断是否为字母
englishCount++;
} else if (Character.isSpaceChar(ch[i])) {
// 判断是否为空格
spaceCount++;
} else if (Character.isDigit(ch[i])) {
// 判断是否为数字
numCount++;
} else {
// 以上都不是则认为是其他字符
otherCount++;
}
}
System.out.println("字母的个数：" + englishCount);
System.out.println("数字的个数：" + numCount);
System.out.println("空格的个数：" + spaceCount);
System.out.println("其他字符的个数：" + otherCount);
}
}
代码如上
import java.util.Scanner; //导入Scanner类
public class Test{
public static void main (String args [ ] ){
Scanner s = new Scanner(System.in);//实例化输入流
String st = null ; //定义字符串用于接收输入
System.out.println("请输入字符串：");
st =s.next(); //完成对输入的接收
char[] c= st.toCharArray(); //将接收的字符串转化为字符数组
int n=0; //用于数字字符计数
for (int i = 0; i < c.length; i++) {
if(c[i]>='0'&&c[i]<='9'){
n++;
}
}
int n1=0; //用于小写字母字符计数
for (int i = 0; i < c.length; i++) {
if(c[i]>='a'&&c[i]<='z'){
n1++;
}
}
int n2=0; //用于大写字母字符计数
for (int i = 0; i < c.length; i++) {
if(c[i]>='A'&&c[i]<='Z'){
n2++;
}
}
int n3=c.length-n-n1-n2; //排除已计数字符后的剩余字符数
System.out.println("您输入的字符串中数字的个数是"+n);
System.out.println("您输入的字符串中小写字母的个数是"+n1);
System.out.println("您输入的字符串中大写字母的个数是"+n2);
System.out.println("您输入的字符串中其它字符的个数是"+n3);
}
}
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