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double max(double arg1, double arg2)
float max(float arg1, float arg2)
int max(int arg1, int arg2)
long max(long arg1, long arg2)

public class Test{
    public static void main(String args[]){
        System.out.println(Math.max(12.123, 18.456));      
        System.out.println(Math.max(23.12, 23.0));  
    }
}

18.456
23.12