Day 16 : Format 클래스 - DecimalFormat() : 숫자 형식 클래스

DecimalFormat() : 숫자 데이터를 원하는 형식으로 표현

 

DecimalFormat df = new DecimalFormat("#,###.0")

String result = df.format(1234567.89);

 

숫자를 원하는 형식으로 출력

package sec15.exam01_format;

import java.text.DecimalFormat;

public class DecimalFormatExample {
	public static void main(String[] args) {
		double num = 1234567.89;
		
		DecimalFormat df = new DecimalFormat("0");
		System.out.println(df.format(num));
		
		df = new DecimalFormat("0.0");
		System.out.println(df.format(num));
		
		df = new DecimalFormat("0000000000.00000");
		System.out.println(df.format(num));
		
		df = new DecimalFormat("#");
		System.out.println(df.format(num));
		
		df = new DecimalFormat("#.#");
		System.out.println(df.format(num));
		
		df = new DecimalFormat("##########.#####");
		System.out.println(df.format(num));
		
		df = new DecimalFormat("#.0");
		System.out.println(df.format(num));
		
		df = new DecimalFormat("+#.0");
		System.out.println(df.format(num));
		
		df = new DecimalFormat("-#.0");
		System.out.println(df.format(num));
		
		df = new DecimalFormat("#,###.0");
		System.out.println(df.format(num));
		
		df = new DecimalFormat("0.0E0");
		System.out.println(df.format(num));
		
		df = new DecimalFormat("+#,###; -#,###");
		System.out.println(df.format(num));
		
		df = new DecimalFormat("#.# %");
		System.out.println(df.format(num));
		
		df = new DecimalFormat("\u00A4 #,###");
		System.out.println(df.format(num));
		
	}
}

1234568
1234567.9
0001234567.89000
1234568
1234567.9
1234567.89
1234567.9
+1234567.9
-1234567.9
1,234,567.9
1.2E6
+1,234,568
123456789 %
\ 1,234,568