判斷輸入的字串中,中英文判別

public class Test{
public static void main(String[] args) {
String test = "Is This 123 中文 or 不是";
System.out.print("char\t");
System.out.print("unicode\t");
System.out.println("hex\t");
System.out.println("---------------------------------");
for (int i = 0; i < test.length(); i++) {
char c = test.charAt(i);
processChar(c);
}
}

private static void processChar(char c) {
int i = (int)c;

System.out.print(c + "\t");
System.out.print((int)c + "\t");
System.out.print(Integer.toHexString(i) + "\t");


if ( (i >= 48) && (i <= 57) ) { System.out.println("this is number"); return; }
if ( (i >= 65) && (i <= 90) ) { System.out.println("this is uppercase letter"); return; }
if ( (i >= 97) && (i <= 122) ) { System.out.println("this is lowercase letter"); return; }
if (i == 32) { System.out.println("this is space"); return; }
if (i > 256) { System.out.println("this may be chinese, japanese...."); return; }
}
}