A summary of the relevant knowledge of arrays in Java (recommended) _java

1,

2, the method of naming the array

1) int[]ages=new int[5];

2) Int[]ages;

Ages=new Int[5];

3) int[]ags={1,2,3,4,5};

4) Int[]ags;

Ags=new int{1,2,3,4};

Or

Int[]ags=new int{1,2,3,4};

3, Java does not support different types of duplicate names array

4. Cyclic assignment of arrays in Java

Package dierge;
 
 public class Shuzu {public
   
   static void Main (String args[]) {
     int[]ags=new int[5];
     int i;
     for (i=0;i<ags.length;i++) {
       ags[i]=i;
       System.out.println ("ags[" +i+ "] is:" +ags[i);}
    }

Print the results as follows:

Ags[0] is: 0
AGS[1] is: 1
AGS[2] is: 2
AGS[3] is: 3
AGS[4] is: 4

5, the initial values of various types of arrays

The code is as follows:

Package dierge;

public class Shuzu {public
  
  static void Main (String args[]) {
    int[]ags=new int[1];
    SYSTEM.OUT.PRINTLN (the default value for an array of int type is: "+ags[0]);
    Boolean[]a=new boolean[1];
    SYSTEM.OUT.PRINTLN ("The default value for the Boolean array is:" +a[0]);
    Byte[]b=new byte[1];
    SYSTEM.OUT.PRINTLN ("The default value of the byte array is:" +b[0]);
    Short[]c=new short[1];
    SYSTEM.OUT.PRINTLN (the default value for the "short type array is:" +c[0]);
    Char[]d=new char[1];
    SYSTEM.OUT.PRINTLN (the default value for the "char type array is:" +d[0]);
    Long[]e=new long[1];
    SYSTEM.OUT.PRINTLN (the default value of the "Long array is:" +e[0]);
    Float[]f=new float[1];
    SYSTEM.OUT.PRINTLN (the default value for the "float type array is:" +f[0]);
    Double[]g=new double[1];
    SYSTEM.OUT.PRINTLN (the default value for the "double array is:" +g[0]);
    
  }

Print the results as follows:

The default value for an array of type int is: 0
The default value for a Boolean array is: false
The default value for the byte array is: 0
The default value for the short type array is: 0
The default values for the char type array are:

The default value for a long array is: 0
The default values for the float type array are: 0.0
The default values for the double array are: 0.0

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