java例程练习（统计字母数字等字符的个数）

[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]
<pre name="code" class="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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