package com.javabase.sss;
public class Dts {
//判断输入的是否是纯数字
public static boolean isShuzi(String str) {
boolean isBok = true;
for (int i = 0; i < str.length(); i++) {
if(str.charAt(i) < '0' || str.charAt(i) > '9') {
isBok = false;
}
}
return isBok;
}
//判断是否是英文字母
public static boolean isYingwen(String str) {
boolean isBok = true;
String s = str.toUpperCase();
for (int i = 0; i < str.length(); i++) {
if(!(s.charAt(i)>='A' && s.charAt(i)<='Z')) {
isBok = false;
}
}
return isBok;
}
public static void main(String[] args) {
String song = "1452ffgsg";
boolean isBok= isShuzi(song);
System.out.println("数字"+isBok);
boolean isSok = isYingwen(song);
System.out.println("英文字符"+isSok);
}
}
java字符串判断
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转载自blog.csdn.net/qq_43314793/article/details/90106799
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