Why will my java program not accept alphabetical input from the user? -

edit: problem has been partially fixed. able enter text, nothing reads after enter 'shiphalf' value. did construct if else statements incorrectly?

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i attempting let people input coupon code unable figure out how let console know user inputting text. feel error somewhere in here:

        system.out.println("enter coupon code: ");         string ship = input.nextline();  

but not entirely sure. here whole source code below:

package pseudopackage;  import java.util.scanner;  public class pseudocode {      public static void main(string[] args) {           scanner input = new scanner(system.in);           int ship1 = 0;         int ship2 = 6;         int ship3 = 2;         string shiphalf = null;          system.out.print("how shipping cost you?");         system.out.println();         system.out.print("enter textbook cost in dollars without $: ");         double cost = input.nextdouble();            if ( cost >= 100 ) {             system.out.println("your shipping costs $0");         } else if ( cost < 100 && cost > 50 ) {             system.out.println("your shipping cost $6");         } else if ( cost < 50 ) {             system.out.println("your shipping cost $2");         }          system.out.println("enter coupon code: ");         string ship = input.nextline();           if ( ship == shiphalf && cost >= 100 ) {             system.out.println("your shipping costs $0");         } else if ( ship == shiphalf && cost < 100 && cost >50 ) {             system.out.println("your shipping costs $3 ");         } else if ( ship == shiphalf && cost < 50 ) {             system.out.println("your shipping costs $1");         }       }  } 

you have 2 problems in code:
1. use input.next() instead of input.nextline().
2. change if conditional ship.equals("shiphalf"). remember use .equals() compare 2 strings.

here final code:

package pseudopackage; import java.util.scanner;  public class pseudocode {      public static void main(string[] args) {          scanner input = new scanner(system.in);          int ship1 = 0;         int ship2 = 6;         int ship3 = 2;         string shiphalf = null;          system.out.print("how shipping cost you?");         system.out.print("\nenter textbook cost in dollars without $: ");         double cost = input.nextdouble();          if ( cost >= 100 ) {             system.out.println("your shipping costs $0");         } else if ( cost < 100 && cost > 50 ) {             system.out.println("your shipping cost $6");         } else if ( cost < 50 ) {             system.out.println("your shipping cost $2");         }          system.out.println("enter coupon code: ");         string ship = input.next();           if ( ship.equals("shiphalf") && cost >= 100 ) {             system.out.println("your shipping costs $0");         } else if ( ship.equals("shiphalf") && cost < 100 && cost >50 ) {             system.out.println("your shipping costs $3 ");         } else if ( ship.equals("shiphalf") && cost < 50 ) {             system.out.println("your shipping costs $1");         }     } }