Groovy - List tail() method

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Description

Groovy List tail() method returns the items of the list excluding the first item. Original List is not affected.

Syntax

public List tail()

Parameters

NA

Return Value

A list of items minus the first item.

Example - Getting items from a List of Integers excluding the first one.

Following is an example of the usage of this method −

main.groovy

def lst = [11, 12, 13, 14, 15]

// get remaining items after excluding first one
remainingItems = lst.tail()
println(remainingItems)

// original list is intact
println(lst)

Output

When we run the above program, we will get the following result −

[12, 13, 14, 15]
[11, 12, 13, 14, 15]

Example - Getting items from a List of Strings excluding the first one.

Following is an example of the usage of this method −

main.groovy

def lst = ["Apple","Mango","Orange","Papaya"]

// get remaining items after excluding the first one
remainingItems = lst.tail()
println(remainingItems)

// original list is intact
println(lst)

Output

When we run the above program, we will get the following result −

[Mango, Orange, Papaya]
[Apple, Mango, Orange, Papaya]

Example - Getting items from a List of Objects excluding the first one.

Following is an example of the usage of this method −

main.groovy

def lst = [new Student(1, "Julie"),new Student(2, "Robert"),new Student(3, "Adam")];

// get remaining items after excluding the first one
remainingItems = lst.tail()
println(remainingItems)

// original list is intact
println(lst)

class Student {
   int rollNo;
   String name;

   Student(int rollNo, String name){
      this.rollNo = rollNo;
      this.name = name;
   }

   @Override
   public boolean equals(Object obj) {
      Student s = (Student)obj;
      return this.rollNo == s.rollNo && this.name.equalsIgnoreCase(s.name);
   }
   
   @Override
   public String toString() {
      return "[ " + this.rollNo + ", " + this.name + " ]";
   }
}

Output

When we run the above program, we will get the following result −

[[ 2, Robert ], [ 3, Adam ]]
[[ 1, Julie ], [ 2, Robert ], [ 3, Adam ]]