public class My {
float[] arr=new float[]{0.1f,0.2f};
arr[0]=0.2f;
public static void main(String []args) {
My my= new My();
System.out.println(my.arr[0]);
}
}
I got errors:
My.java: 4 : error: ']' expected
arr[0]=0.2f;
^
My.java: 4 : error: ';' expected
arr[0]=0.2f;
^
My.java: 4 : error: illegal start of type
arr[0]=0.2f;
^
My.java: 4 : error: <identifier> expected
arr[0]=0.2f;
^
Is there any way to use arr[0]=somevalue; ? Like they do in C?
You can either fix the initializer of arr to hold the right value from the start
float[] arr=new float[]{0.2f,0.2f};
or you can change your class to change the value inside the constructor:
public class My {
float[] arr=new float[]{0.1f,0.2f};
public My() {
arr[0]=0.2f;
}
...
}
Declare array inside a block or function, without using Array as field
public class My{
public static void main(String[] args) {
float[] arr = new float[] { 0.1f, 0.2f };
arr[0] = 0.2f;
//My my = new My();
System.out.println(arr[0]);
}
}
Array as a field using constructor
public class My{
private float[] arr = null;
private My() {
arr = new float[] { 0.1f, 0.2f };
}
public static void main(String[] args) {
My my = new My();
System.out.println(my.arr[0]);
}
}
You can fix the initializer of arr value and declare array inside a class.
public class My
{
public static void main( String[] args )
{
My my = new My();
System.out.println( my.arr[0] );
}
private float[] arr = new float[]
{ 0.1f, 0.2f };
}
