这是一个求绝对值的方法里面包括对double ，int ，float，long 类型的数据的操作！
package com.seimma.numrmb;
public class AbsoluteValue {
???? public static void main(String坚强的母鸡 args) {
??? ????? AbsoluteValue abs=new AbsoluteValue();
??? ????? System.out.println(abs.absolute(-9));
???? }
????
???? public double absolute(double num){
??? ????? if(num >=0){
??? ?????????? ?return num;
??? ????? }else {
??????????????? return -num;
???????? ?}
???? }
????
???? public int absolute(int num){
?????? ? if(num >=0){
??? ??????? ? return num;
?????? ? }else {
????????????? return -num;
???????? }
????}
????
???? public float absolute(float num){
??????????if(num >=0){
??? ???????? ?return num;
??? ????? }else {
????????????? return -num;
???????? }
???}
????
???? public long absolute(long num){
???????? ?if(num >=0){
??? ?????????? return num;
??????????}else {
??????????????? ?return -num;
??????? ?}
???? }
}
