class Seasons{
public static void main(String[] args){
String[][] seasons = new String[4][ ];
// main array size is set but subarrays can vary in size
String[] Winter=new String[]{"Jan","Feb","Mar"};
String[] Spring=new String[]{"Apr","May","June"};
String[] Summer=new String[]{"July","Aug","Sept"};
String[] Fall=new String[]{"Oct","Nov","Dec"};
seasons[0]=Winter;
seasons[1]=Spring;
seasons[2]=Summer;
seasons[3]=Fall;
for(int i=0;i<seasons.length;i++){
for(int j=0;j<3;j++){
System.out.println(seasons[i][j]);
}
}
}
}
1. Compile and run the
above class. Then, adapt the above class to create a new 'array
of
arrays' whose values will be printed to screen. Your class will contain
three fictitious
warehouses,
named by a different country where each might exist. For each warehouse
create
subarrays containing string literals describing the five most important
items stored
at
the warehouse. Write compile and run the new class so that these values
are printed
to
screen.
class arrayCopy{
public static void main(String[] args){
//********* Code Snippet 1
String[] statement = new String[] { "It's", "not",
"true", "it", "was", "my", "plan"};
String[] out_of_context= new String[ 4];
System.arraycopy(statement, 3, out_of_context, 0, 4);
for(int i=0; i <out_of_context.length;
i++)
System.out.print(out_of_context[i]+"
");
System.out.println("\n");
//******************************************Code
Snippet 2 // shift
operators
int shift = 1000;
System.out.println(shift); //before
shift = 1000 >> 2;
System.out.println(shift); // after
}
}
Questions // continued
Q2. Rewrite arrayCopy so that it writes NOT TRUE.
Q3 Substitute -1000 in for 1000 above.
Report what you observe?
Q4. Keeping -1000 in place, change the operator
to the unsigned right shift operator, >>>.
Explain
what happens?
// Reminder: The unsigned
right shift operator( >>> ) performs what is called a logical shift in
filling
// the most significant
bits with zeros. The signed right shift operator ( >> )does an arithmetic
shift
// (keeping the
sign, in this case, by filling with ones).