자바 숫자인지 문자인지 구분 예제.

public class checkStringOrNumeric {
	public checkStringOrNumeric() {
		String numericVal = "30";
		String stringVal = "TEST";
		
		checkStringOrNumeric(numericVal);
		
		checkStringOrNumeric(stringVal);
	}
	
	public void checkStringOrNumeric(String val) {
		try {
			Double.parseDouble(val);
		} catch(NumberFormatException nfe) {
			//nfe.printStackTrace();
			System.out.println("Val is String.");
			return;
		}
		
		System.out.println("Val is Numeric.");
	}
}