根据Ascll码表来进行统计数据:
System.out.println("请输入字符串:");
Scanner sc = new Scanner(System.in);
String str = sc.nextLine();
int bigchar = 0,smallchar=0,number = 0,blank = 0,other=0;
int nine=0,one=0,three=0,five=0,serven=0;
int n = str.length();
for(int i=0;i<n;i++){
if(str.charAt(i) >=65&&str.charAt(i)<=90){
bigchar++;
}else if(str.charAt(i)>=97&&str.charAt(i)<=122){
smallchar++;
}else if(str.charAt(i)>=48&&str.charAt(i)<=57){
if(str.charAt(i) == 49){
one++;
}else if(str.charAt(i)== 51){
three++;
}else if(str.charAt(i)==53){
five++;
}else if(str.charAt(i)== 55){
serven++;
}else if(str.charAt(i)==57){
nine++;
}
number++;
}else if(str.charAt(i)==32){
blank++;
}else {
other++;
}
}
System.out.println("大写字母个数:"+bigchar);
System.out.println("小写字母个数:"+smallchar);
System.out.println("数字个数:"+number);
System.out.println("空格个数:"+blank);
System.out.println("其他字母个数:"+other);
System.out.println("1出现的个数:"+one);
System.out.println("3出现的个数:"+three);
System.out.println("5出现的个数:"+five);
System.out.println("7出现的个数:"+serven);
System.out.println("9出现的个数:"+nine);
System.out.println("13579的总个数:"+(one+three+five+serven+nine));
}
运行结果图: