Java List Starts with startsWith(List string, List prefix)

Description

Checks if the list starts with specific elements.

License

Open Source License

Parameter

Parameter	Description
T	the element type
string	the list
prefix	the starting elements of the list

Return

true if and only if string starts with prefix , false otherwise

Declaration

public static <T> boolean startsWith(List<T> string, List<T> prefix) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.util.List;

public class Main {
    /**//from w  ww  .ja v  a2 s . c  o  m
     * Checks if the list starts with specific elements.
     *
     * @param <T> the element type
     * @param string the list
     * @param prefix the starting elements of the list
     * @return {@code true} if and only if {@code string} starts with
     * {@code prefix}, {@code false} otherwise
     */
    public static <T> boolean startsWith(List<T> string, List<T> prefix) {
        final int stringSize = string.size();
        final int prefixSize = prefix.size();
        if (prefixSize > stringSize) {
            return false;
        }
        return prefix.equals(string.subList(0, prefixSize));
    }

    /**
     * Check equality in a null-friendly fashion.
     *
     * @param a an object
     * @param b an object to compare with a
     * @return true if and only if a equals b, false otherwise
     */
    public static boolean equals(Object a, Object b) {
        return (a == b) || (a != null && a.equals(b));
    }
}

Related

1. startsWith(List left, List right, boolean equals)
2. startsWith(List left, List right, boolean equals)
3. startsWith(List list0, List list1)
4. startsWithAny(String s, List prefixes)
5. startsWithWord(String aTarget, List aExpectWordList)