I can't understand this please help...
package com.codegym.task.task02.task0217;
/*
Minimum of four numbers
*/
public class Solution {
public static int min(int a, int b, int c, int d) {
//write your code here
int min1;
if (min(a,b) <= c && min(a,b) <= d){
min1 = a;
}
else if (b <= c && b <= d){
min1 =b;
}
else if (c <= d){
min1 = c;
}
else{
min1 =d;
}
return min1;
}
public static int min(int a, int b) {
//write your code here
int c;
if(a<b)
c=a;
else
c=b;
return c;
}
public static void main(String[] args) throws Exception {
System.out.println(min(-20, -10));
System.out.println(min(-20, -10, -30, -40));
System.out.println(min(-20, -10, -30, 40));
System.out.println(min(-40, -10, -30, 40));
}
}