How to convert negative number to positive in Java？

To convert negative number to positive number (this is called absolute value), uses Math.abs(). This Math.abs() method is work like this “number = (number < 0 ? -number : number);".

See a complete example :

/** * 测试负数转正数 */@Testpublic void test2() {// TODO Auto-generated method stubint total = 1 + 1 + 1 + 1 + (-1);// output 3System.out.println("Total：" + total);int total2 = 1 + 1 + 1 + 1 + Math.abs(-1);// output 5System.out.println("Total 2 (absolute value)：" + total2);}

Output：

Total : 3Total 2 (absolute value) : 5

In this case, Math.abs(-1) will convert the negative number 1 to positive 1.