Métodos de criação e passagem de parâmetros de arrays em Java (resumo de aprendizado)

(I) Criação de arrays

A criação de arrays inclui duas partes: a declaração do array e a alocação de espaço de memória.

int score[]=null; //declarar um array unidimensional
score=new int[3}; //alocar o comprimento de3espaço

A declaração de arrays pode ser feita de outra maneira:

int[] score=null; //Write the square brackets in front of the array name

Generally, in writing code, for convenience, we merge the two lines into one line:

int score[]=new int score[3}; //Write the declaration and memory allocation of the array in one line

(II) Passing parameters

Since this is an introduction to Java for beginners, we will only discuss value passing and not address passing. Mainly3Point:

· The actual parameter is the array name;

· The formal parameter is the newly declared array. If there is a return value, add square brackets "[]" after the function type;

· The return value is the array name.

Example:

/**
* Created by lijiaman on 2016/9/16.
*/
public class createArray2
{
public static void main(String[] args)
{
int score[]=null;
score=new int[3};
int speed[]={12,35};
for(int x=0;x<3;x++)
{
score[x]=x*2+1;
}
for(int x=0;x<3;x++)
{
System.out.println("score[")+x+"]="+score[x]);
}
System.out.println("length:")+score.length);
for(int x=0;x<speed.length;x++)
{
System.out.println("Speed:")+speed);
}
}
}

The above is the introduction of the creation and parameter passing method of arrays in Java introduced by the editor. I hope it will be helpful to everyone. If you have any questions, please leave a message, and the editor will reply to everyone in time!

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