How do I make an Array of an object?

Question

If I have the following class:
public class myStruct {
     String pid;
     String name;
How do I make an array of myStruct's?
I tried to do something like this
public class MyTest {
public static void main ( String [] args ) {
     System.out.println( "test myStruct");
     myStruct [] k = new myStruct[ 10 ];
     k[0].pid = "1";
     k[0].mnemonic = "test";
     System.out.println( k[0].pid );
It compiles, but I get "Exception in thread "main" java.lang.NullPointerException at MyTest.main
I know I am doing something wrong, any ideas how I could do something like this?

Answer 1

in class myStruct,
public class myStruct {
String pid;
String name;
there is no 'String mnemonic;".
in class MyTest, you have a line that reads
k[0].mnemonic = "test";
when there is no String mnemonic in myStruct. maybe that's why.