java例程练习（统计字母数字等字符的个数） - JAVA

[java]
public class Test {
public static void main(String[] args) {
//String s = "48WERSFas!@#";
String s = "23479odurqjPOWUER00*)*&)(#084234-9LRWEJRLJ5R2)*q#)*puFOURoupPU_(*";

int countNum = 0;
int countUpperCase = 0;
int countLowerCase = 0;
int countOther = 0;
char[] sc = new char[s.length()];

for(int i = 0; i < s.length(); i++) {
sc[i] = s.charAt(i);

if(sc[i] >= 65 && sc[i] <= 90) {
countUpperCase ++;
} else if(sc[i] >= 87 && sc[i] <= 122) {
countLowerCase ++;
} else if(sc[i] >= 48 && sc[i] <= 57){
countNum ++;
} else {
countOther ++;
}
}

System.out.println(countNum);
System.out.println(countUpperCase);
System.out.println(countLowerCase);
System.out.println(countOther);
}
}
[java]

[java]

//还有一种方法
[java]

public class Test { 
 
     public static void main(String[] args) { 
 
         String s = "48WERSFas!@#"; 
 
         //String s = "23479odurqjPOWUER00*)*&)(#084234-9LRWEJRLJ5R2)*q#)*puFOURoupPU_(*"; 
 
          
 
         int countNum = 0; 
 
         int countUpperCase = 0; 
 
         int countLowerCase = 0; 
 
         int countOther = 0; 
 
          
 
         for(int i = 0; i < s.length(); i++) { 
 
             char c = s.charAt(i); 
 
              
 
             if(c >= 'A' && c <= 'Z') { 
 
                 countUpperCase ++; 
 
             } else if(c >= 'a' && c <= 'z') { 
 
                 countLowerCase ++; 
 
             } else if(c >= '0' && c <= '9'){ 
 
                 countNum ++; 
 
             } else { 
 
                 countOther ++; 
 
             } 
 
         } 
 
          
 
         System.out.println(countNum); 
 
         System.out.println(countUpperCase); 
 
         System.out.println(countLowerCase); 
 
         System.out.println(countOther); 
 
     } 
 
 } 
 
 
 
 
 
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