判断字符串中的字符大小写和其他字符

public class TestStringCase {
public static void main(String[] args) {
String s = "ABAabb$&^$#BAAb898B#@%aa";
int cU = 0, cL = 0, cO = 0;
for(int i=0; i<s.length(); i++) {
char c = s.charAt(i);

if(c >= 'A' && c <= 'Z') {
cU ++;
} else if( c >= 'a' && c <='z') {
cL ++;
} else {
cO ++;
}
}

System.out.println("大写：" + cU);
System.out.println("小写：" + cL);
System.out.println("其他：" + cO);
}
}

public class TestStringCase {
public static void main(String[] args) {
String s = "ABAabb$&^$#BAAb898B#@%aa";
lCount=0;
uCount=0;
oCount=0;
for (int i= 0;i<s.length();i++){
char c = s.charAt(i);
if(Character.isLowerCase(c)){
lCount++;
}else if (Character.isUpperCase(c)){
uCount++;
}
else{
oCount++;
}
}
System.out.println(lCount+""+uCount+""+oCount);
}

实现方法三
java.lang.String

public class TestString{
public static void main(String[] args) {
String s = "ABAabb$&^$#BAAb898B#@%aa";
String sL="abcdefghijklmnopqrstuvwxyz";
String sU="ABCDEFGHIJKLMNOPQRSTUVWXYZ";
lCount=0;
uCount=0;
oCount=0;
for (i=0;i<s.length();i++){
char c = s.charAt(i);
if(sL.indexOf(c)!=-1){
lCount++;
}else if(sL.indexOf(c)!=-1){
uCount++;
}else{
oCount++;
}
}
System.out.println("大写：" + uCount);
System.out.println("小写：" + lCount);
System.out.println("其他：" + oCount);
}
}