JAVA数字格式化

package text;

import java.awt.print.Book;
import java.lang.reflect.Array;
import java.security.Principal;
import java.sql.Date;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;

import javax.xml.crypto.Data;

public class text1 {
    // TODO Auto-generated method stub
    static public void SimgleFormat(String pattem, double value){
        DecimalFormat myFormat = new DecimalFormat(pattem);
        String output = myFormat.format(value);
        System.out.println(value + " " + pattem + " " + output);
    }
    
    static public void UseApplypattenMethodFormat(String pattem , double value){
        DecimalFormat myFormat = new DecimalFormat(pattem);
        myFormat.applyPattern(pattem);
        System.out.println(value + " " + " " + myFormat.format(value));
    }
    
    public static void main(String[] args) {
        SimgleFormat("###,###,###.###", 123456.789);
        SimgleFormat("00000000.####kg", 123456.789);
        SimgleFormat("000000.000", 123.78);
        UseApplypattenMethodFormat("#.###%",0.789);
        UseApplypattenMethodFormat("###.##", 123456.789);
        UseApplypattenMethodFormat("0.00u2030", 0.789);
    }
}

package text;

import java.awt.print.Book;
import java.lang.reflect.Array;
import java.security.Principal;
import java.sql.Date;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;

import javax.xml.crypto.Data;

public class text1 {
    // TODO Auto-generated method stub
    public static void main(String[] args) {
        DecimalFormat myFormat = new DecimalFormat();
        myFormat.setGroupingSize(2);
        String output1 = myFormat.format(123465.789);
        System.out.println("分组后的结果 "+ output1);
        myFormat.setGroupingUsed(false);
        String output2 = myFormat.format(123456.789);
        System.out.println("未分组的结果 "+ output2);
    }
}