My question is, how can I show from my main, a method that is returning an array without returning a memory address ?. My code is now like this.
Main
System.out.println(ciudad1.getMaximas());
//Aqui quiero que me imprima lo que contiene el array, pero sale la direccion de memoria.
Clase
float []getMaximas(){
return temperaturaMaxima;
}
Arrays are objects that inherit the implementation of toString() of Object (which is that rare string with numbers - not necessarily a memory location -).
You can not reimplement the toString() method of an array, so there are two options:
Iterate over the array (for example with enhanced for ) and print each item in the array separately.
Use the toString(Object[]) method of java.util.Arrays , which does more or less the same.
Hello, you can do it by importing the Class java.util.Arrays;
and replacing your code:
System.out.println (city1.getMaximums ());
for the following
System.out.println (Arrays.asList (city1.getMaximums ()));
I hope you serve
Greetings.
An array is an object, and what you are shown is not a memory address, but simply a name assigned to the object. What you have to do is iterate over the arrangement to show it:
float[] temperaturaMaxima = { 22.488L, 32.433L, 27.32L };
public float[] getMaxima(){
return temparaturaMaxima;
}
public String arregloToJSONString(float[] arreglo){
StringBuilder sb = new StringBuilder();
sb.append("[ ");
for (int i = 0; i<arreglo.length; i++ ){
sb.append(String.valueOf(arreglo[i]));
if (i<arreglo.length-1) sb.append(", ");
}
sb.append(" ]");
return sb.toString();
}
The code gives you a representation of the arrangement in this case in JSON format, but in the background you choose how to present your data.
System.out.println(arregloToJSONString(getMaxima()));
// => "[ 22.488, 32.433, 27.32 ]
A loop? How about ...
System.out.println("Array:");
for(Float numero: ciudad1.getMaximas())
System.out.println("-- "+numero);
Use a toString method. I think java arrays by default have one defined. If not, you can overwrite the method itself to return a string with the format you want.