Consider the following implementation of the compareTo() method for String. How does the third line help with efficiency? public int compareTo(String that) { if (this == that) return 0; // this line int n = Math.min(this.length(), that.length()); for (int i = 0; i < n; i++) { if (this.charAt(i) < that.charAt(i)) return -1; else if (this.charAt(i) > that.charAt(i)) return +1; } return this.length() - that.length(); }
Consider the following implementation of the compareTo() method for String. How does the third line help with efficiency? public int compareTo(String that) { if (this == that) return 0; // this line int n = Math.min(this.length(), that.length()); for (int i = 0; i < n; i++) { if (this.charAt(i) < that.charAt(i)) return -1; else if (this.charAt(i) > that.charAt(i)) return +1; } return this.length() - that.length(); }
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Question
Consider the following implementation of the compareTo() method for String.
How does the third line help with efficiency?
public int compareTo(String that)
{
if (this == that) return 0; // this line
int n = Math.min(this.length(), that.length());
for (int i = 0; i < n; i++)
{
if (this.charAt(i) < that.charAt(i)) return -1;
else if (this.charAt(i) > that.charAt(i)) return +1;
}
return this.length() - that.length();
}
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