public class Test {


public static void hello(){
System.out.print("HelloJAVA ");
}

public static int sum(int a, int b){
int sum = a+b;
return sum;
}
public static int max(int a, int b){

return a>b?a:b;
}

public static void main(String[] args) {

hello();
sum(20, 21);
System.out.print("[10と20の最大値]："+max(10,20));
}
}