[JAVA] DecimalFormat 클래스 자바 소수자릿수 설정

표와 소스를 참고해서 이해하기!

 

public class exmaple {
	static DecimalFormat df;
	
	public static void main(String[] args) {
		double x = 12345.67891;
		double y = 0.00012;
		
		df = new DecimalFormat("0");
		System.out.println(df.format(x)); //12346
		System.out.println(df.format(y)); //0
		
		df = new DecimalFormat("0.0");
		System.out.println(df.format(x)); //12345.7
		System.out.println(df.format(y)); //0.0
		
		df = new DecimalFormat("000000.000000");
		System.out.println(df.format(x)); //012345.678910
		System.out.println(df.format(y)); //000000.000120
		
		df = new DecimalFormat("######.#######");
		System.out.println(df.format(x)); //12345.67891
		System.out.println(df.format(y)); //0.00012
		
		df = new DecimalFormat("0.0%");
		System.out.println(df.format(x)); //1234567.9%
		System.out.println(df.format(y)); //0.0%
		
		df = new DecimalFormat("0%");
		System.out.println(df.format(x)); //1234568%
		System.out.println(df.format(y)); //0%
	}
}