java 数字格式化

import java.text.NumberFormat;
import java.text.DecimalFormat;
import java.util.Locale;

/**
* Created by IntelliJ IDEA.
*
* @author sun
*/
public class TestNumFormat {

        public static void main(String[] args) {

                DecimalFormat df1 = new DecimalFormat("###.00");
                System.out.println(df1.format(234234.234634));
                System.out.println(df1.format(34.234634));

                DecimalFormat df2 = new DecimalFormat("0.00E0000");
                System.out.println(df2.format(23423.34234234));

                DecimalFormat df3 = (DecimalFormat)NumberFormat.getInstance(Locale.CHINESE);
                df3.applyPattern("####.000");
                System.out.println(df3.format(23423.34234234));
                df3.applyPattern("00.0000%");
                System.out.println(df3.format(0.5552445));

                NumberFormat nf1 = NumberFormat.getInstance();
                System.out.println(nf1.format(13423423.234234));

                NumberFormat nf2 = NumberFormat.getPercentInstance();
                System.out.println(nf2.format(0.55));

        }
}