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public static boolean isNumeric(String str){
for (int i = str.length();--i>=0;){
if (!Character.isDigit(str.charAt(i))){
return false;
}
}
return true;
}
2>ÓÃÕýÔò±í´ïʽ
public static boolean isNumeric(String str){
Pattern pattern = Pattern.compile("[0-9]*");
return pattern.matcher(str).matches();
}
3>ÓÃasciiÂë
public static boolean isNumeric(String str){
for(int i=str.length();--i>=0;){
int chr=str.charAt(i);
if(chr<48 || chr>57)
return false;
}
return true;
}
4>ÓÃÒì³£
public static boolean isNumeric(String str){
try{
Integer.parseInt(str);
}
catch(NumberFormatException ne){
return false;
}
return true;
}
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