用java语言编写一个程序，输出一个字符串中的大写字母数。 java,编写程序，从命令行读入字符串，显示该字符串中大写字...
\u7f16\u5199Java\u7a0b\u5e8f\uff0c\u5c06\u4e00\u5b57\u7b26\u4e32\u5176\u4e2d\u7684\u5927\u5c0f\u5199\u5b57\u6bcd\u7684\u5b57\u7b26\u5206\u522b\u8f93\u51fa\u5faa\u73af\u5b57\u7b26\u4e32\u7528charAt\u65b9\u6cd5\u6765\u83b7\u53d6\u5b57\u7b26\uff0c\u5c06\u5b57\u7b26\u8f6c\u4e3aint\uff0c\u53ea\u8981\u5224\u65ad\u8f6c\u6362\u540e\u7684\u6570\u503c\u5c31\u53ef\u4ee5\u5224\u65ad\u5927\u5c0f\u5199\u5b57\u6bcd\uff0c\u5927\u5199\u5b57\u6bcd\u7684\u8303\u56f4\u662f65-90\uff0c\u5c0f\u5199\u5b57\u6bcd\u7684\u8303\u56f4\u662f97-122\u3002
public class Main {
public static void main(String[] args) {
String s = "aaBvdEFdsd";
StringBuffer ss = convertString(s);
System.out.println("\u5927\u5c0f\u5199\u8f6c\u6362\u540e\u662f:" + convertString(s));
System.out.println("\u5012\u5e8f\u8f93\u51fa\u540e\u662f:" + ss.reverse());
}
public static StringBuffer convertString(String str) {
String upStr = str.toUpperCase();
String lowStr = str.toLowerCase();
StringBuffer buf = new StringBuffer(str.length());
for (int i = 0, k = str.length(); i < k; i++) {
{
if (str.charAt(i) == upStr.charAt(i)) {
buf.append(lowStr.charAt(i));
} else {
buf.append(upStr.charAt(i));
}
return buf;
\u6269\u5c55\u8d44\u6599\uff1a
\u5b57\u7b26\u4e32\u5728\u5b58\u50a8\u4e0a\u7c7b\u4f3c\u5b57\u7b26\u6570\u7ec4\uff0c\u5b83\u6bcf\u4e00\u4f4d\u5355\u4e2a\u5143\u7d20\u90fd\u662f\u80fd\u63d0\u53d6\u7684\uff0c\u5b57\u7b26\u4e32\u7684\u96f6\u4f4d\u662f\u5b83\u7684\u957f\u5ea6\uff0c\u5982s[0]=10\uff0c\u8fd9\u63d0\u4f9b\u7ed9\u6211\u4eec\u5f88\u591a\u65b9\u4fbf\uff0c\u4f8b\u5982\u9ad8\u7cbe\u5ea6\u8fd0\u7b97\u65f6\u6bcf\u4e00\u4f4d\u90fd\u80fd\u8f6c\u5316\u4e3a\u6570\u5b57\u5b58\u5165\u6570\u7ec4\u3002
\u901a\u5e38\u4ee5\u4e32\u7684\u6574\u4f53\u4f5c\u4e3a\u64cd\u4f5c\u5bf9\u8c61\uff0c\u5982\uff1a\u5728\u4e32\u4e2d\u67e5\u627e\u67d0\u4e2a\u5b50\u4e32\u3001\u6c42\u53d6\u4e00\u4e2a\u5b50\u4e32\u3001\u5728\u4e32\u7684\u67d0\u4e2a\u4f4d\u7f6e\u4e0a\u63d2\u5165\u4e00\u4e2a\u5b50\u4e32\u4ee5\u53ca\u5220\u9664\u4e00\u4e2a\u5b50\u4e32\u7b49\u3002\u4e24\u4e2a\u5b57\u7b26\u4e32\u76f8\u7b49\u7684\u5145\u8981\u6761\u4ef6\u662f\uff1a\u957f\u5ea6\u76f8\u7b49\uff0c\u5e76\u4e14\u5404\u4e2a\u5bf9\u5e94\u4f4d\u7f6e\u4e0a\u7684\u5b57\u7b26\u90fd\u76f8\u7b49\u3002\u8bbep\u3001q\u662f\u4e24\u4e2a\u4e32\uff0c\u6c42q\u5728p\u4e2d\u9996\u6b21\u51fa\u73b0\u7684\u4f4d\u7f6e\u7684\u8fd0\u7b97\u53eb\u505a\u6a21\u5f0f\u5339\u914d\u3002\u4e32\u7684\u4e24\u79cd\u6700\u57fa\u672c\u7684\u5b58\u50a8\u65b9\u5f0f\u662f\u987a\u5e8f\u5b58\u50a8\u65b9\u5f0f\u548c\u94fe\u63a5\u5b58\u50a8\u65b9\u5f0f\u3002
\u53c2\u8003\u8d44\u6599\u6765\u6e90\uff1a\u767e\u5ea6\u767e\u79d1-\u5b57\u7b26\u4e32
\u60a8\u597d\uff0c\u63d0\u95ee\u8005\uff1a
//\u7a0b\u5e8f\u6ca1\u6709\u8fd0\u884c\uff0c\u5982\u6709\u9519\u8bef\uff0c\u8bf7\u81ea\u884c\u4fee\u6539public class Print{public static void main(String[] args){ java.util.Scanner sc = new java.util.Scanner(System.in); String str = sc.next(); char[] arr = str.toCharArray(); int sum = 0;//\u7edf\u8ba1\u591a\u5c11\u4e2a\u5927\u5199\u5b57\u6bcd String result = ""; //\u8fde\u63a5\u5927\u5199\u5b57\u6bcd for(int i = 0; i = 65 && (int)arr[i] <= 90){ sum = ++sum; result += arr[i]; } } System.out.println("\u5927\u5199\u5b57\u6bcd\u4e00\u5171\uff1a" + sum+"---"); System.out.println("\u5206\u522b\u4e3a\uff1a" + result); } }}
{
//封装一个Map，key为String类型，value为字母数，其中key为UpperChar的value存大写字母数
//key为LowerChar的value存放小写字母数，key为OtherChar的value存放非英文字母数
Map<String,Integer> map = new HashMap<String,Integer>();
int upperValue = 0;
int lowerValue = 0;
int otherValue = 0;
for (int i = 0 ; i < str.length(); i++)
{
if (str.charAt[i] > 'a' && str.charAt[i] < 'z')
{
lowerValue++;
}
else if (str.charAt[i] > 'A' && str.charAt[i] < 'Z')
{
upperValue++;
}
else
{
otherValue++;
}
}
map.put("UpperChar",upperValue);
map.put("LowerChar",lowerValue);
map.put("OtherChar",otherValue);
return map;
}
然后再main()方法中调用这个函数，通过下面这种方式获取其值
Map<String,Integer> map = 对象名.getCharacterNum(inputStr);
int upperNum = (int) map.get("UpperChar");
public class UpcaseTest {
public int[] getNumber(String str) {
char[] c = str.toCharArray();
int[] number = new int[3];//数组中依次存放大写字母数、小写字母数和非英文数
for (int i = 0; i < c.length; i++) {
if (c[i] >= 'A' && c[i] <= 'Z') {
number[0]++;//大写字母数加1
}else if (c[i] >= 'a' && c[i] <= 'z') {
number[1]++;//小写字母数加1
}else{
number[2]++;//非英文数加1
}
}
return number;
}
public static void main(String[] args) {
// TODO Auto-generated method stub
String str = "aaaASDFS.,/;'d";
int[] result=new UpcaseTest().getNumber(str);
for(int i=0;i<result.length;i++){
System.out.println(result[i]);
}
}
}有不懂可以追问
public abstract class StringUtil{
String inputString = "";
//输入程序(初始化inputString)
//统计方法
public abstract long getLength();
public static void main(String[] args){
StringUtil stringUtil = new LowerUtil();
//调用输入程序
stringUtil.inputString = "Zhu Cheng feng is a good boy!";
System.out.println(stringUtil.getLength());
}
}
/**
* 处理字符串中的大写部分
* @author zcf
* @since 20140325
*
*/
class UpperUtil extends StringUtil{
@Override
public long getLength() {
if(!"".equals(inputString)){
return inputString.split("[A-Z]").length>0
?inputString.split("[A-Z]").length-1:0;
}
return 0;
}
}
/**
* 处理字符串中的小写部分
* @author zcf
* @since 20140325
*
*/
class LowerUtil extends StringUtil{
@Override
public long getLength() {
if(!"".equals(inputString)){
return inputString.split("[a-z]").length>0
?inputString.split("[a-z]").length-1:0;
}
return 0;
}
}
/**
* 处理字符串中的数值部分
* @author zcf
* @since 20140325
*
*/
/**
* 处理字符串中的符号部分
* @author zcf
* @since 20140325
*
*/
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class OutputUpperCase
{
static String str = "AbCdE fGh NNMM ZZZ";
public static void main(String[] args)
{
Pattern upperPattern = Pattern.compile("[A-Z]");
Pattern lowerPattern = Pattern.compile("[a-z]");
int upperCount = getOutput(upperPattern);
int lowerCount = getOutput(lowerPattern);
Pattern nonLetterPattern = Pattern.compile("[^A-Za-z]");
Matcher matcher = nonLetterPattern.matcher(str);
int nonLetterCount = getOutput(matcher); // 调用了重载方法getOutput(Matcher)
System.out.println(upperCount + " Upper Chars");
System.out.println(lowerCount + " Lower Chars");
System.out.println(nonLetterCount + " Non Letter Chars");
}
private static int getOutput(Pattern pattern)
{
Matcher matcher = pattern.matcher(str);
int result = 0;
while(matcher.find())
{
result ++;
}
return result;
}
private static int getOutput(Matcher matcher)
{
int result = 0;
while(matcher.find())
{
result ++;
}
return result;
}
}
public class NumOfString
{
public static void main(String args[]) {
String s = "1jkhKhjklhklHLHjb90kBNo9" ;
int cU = 0 ;
int cL = 0 ;
int cN = 0 ;
char c ;
for(int i=0 ;i<s.length() ;i++) {
c = s.charAt(i) ;
if(c > 'a' && c < 'z') {
cL ++ ;
}
else if(c > 'A' && c < 'Z') {
cU ++ ;
}
else {
cN ++ ;
}
}
System.out.println("Number of LowerCase:" + cL) ;
System.out.println("Number of UpperCase:" + cU) ;
System.out.println("Number of NotChar:" + cN) ; }
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