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You could rely on the fact that the primitive wrappers all implement the Comparable interface...

public static Comparable min(Comparable c1, Comparable c2){
return c1.compareTo(c2) < 0 ? c1 :...

Just use the Math class

int i1 = 5;
int i2 = 10;
float f1 = 1.0;
float f2 = 5;
double d1 = 1;
double d2 = 10;
System.out.println(Math.min(i1,i2));
System.out.println(Math.min(f1,f2));

Why use generics then? Do you want to compare primitives or objects? To compare intergers, just pass primitives:

int min(int val1, int val2){
return val1 < val2 ? val1 : val2;
}

Or just use...