Which of the following string () method are used to compare two strings with each other?
String Manipulation can be of immense help in different domains. It may help in text analytics, data matching, data mining etc. In this article we will focus on comparing two strings in Java which again different purposes for string manipulation. Following are the pointers that would be discussed here Show
So let us get started then, A sequence of characters can be defined as a String. They are immutable, i.e. they cannot be modified once created. There are various methods to compare two strings in java, as seen below. String Equals MethodThe strings are compared on the basis of the values present in the string. The method returns true if the values of the two strings are same, and false, if the values don’t match. public class Main { public static void main(String args[]) { String str1 = new String("Rock"); String str2 = new String("Roll"); String str3 = new String("rock"); String str4 = new String("Rock"); String str5 = new String("Roll"); //comparing the strings System.out.println("Comparing " + str1 + " and " + str2 + " : " + str1.equals(str2)); System.out.println("Comparing " + str3 + " and " + str4 + " : " + str3.equals(str4)); System.out.println("Comparing " + str4 + " and " + str5 + " : " + str4.equals(str5)); System.out.println("Comparing " + str1 + " and " + str4 + " : " + str1.equals(str4)); } } Output: Comparing Rock and Roll :false Comparing rock and Rock :false Comparing Rock and Roll :false Comparing Rock and Rock :true Let us continue with the second bit of this article, String Equals Ignore CaseThis method compares the two strings, and does not take into account the case of the string( lower or upper). Returns true if the values are equal and not null. public class Main { public static void main(String args[]) { String str1 = new String("Rock"); String str2 = new String("Roll"); String str3 = new String("rock"); String str4 = new String("Rock"); String str5 = new String("Roll"); //Comparing Strings System.out.println("Comparing " + str1 + " and " + str2 + " : " + str1.equalsIgnoreCase(str2)); System.out.println("Comparing " + str3 + " and " + str4 + " : " + str3.equalsIgnoreCase(str4)); System.out.println("Comparing " + str4 + " and " + str5 + " : " + str4.equalsIgnoreCase(str5)); System.out.println("Comparing " + str1 + " and " + str4 + " : " + str1.equalsIgnoreCase(str4)); } } Output: Comparing Rock and Roll :false Comparing rock and Rock :true Comparing Rock and Roll :false Comparing Rock and Rock :true Let us move further with the next bit of this comparing two strings in Java article, Object Equals MethodIf the arguments are equal to the each other, the method returns true, else, it returns false. If both the arguments present are null, the output returned is true. If a single argument is of a null value, the output returned is false. import java.util.*; public class Main { public static void main(String args[]) { String str1 = new String("Rock"); String str2 = new String("Roll"); String str3 = new String("Roll"); String str4 = null; String str5 = null; System.out.println("Comparing " + str1 + " and " + str2 + " : " + Objects.equals(str1, str2)); System.out.println("Comparing " + str2 + " and " + str3 + " : " + Objects.equals(str2, str3)); System.out.println("Comparing " + str1 + " and " + str4 + " : " + Objects.equals(str1, str4)); System.out.println("Comparing " + str4 + " and " + str5 + " : " + Objects.equals(str4, str5)); } } Output: Comparing Rock and Roll :false Comparing Roll and Roll :true Comparing Rock and null :false Comparing null and null :true Let us move further now String Compare To MethodIn this method, the input strings are compared to each other. The value returned after comparison is as follows:
Code import java.util.*; public class Main { public static void main(String args[]) { String str1 = new String("Rock"); String str2 = new String("Pop"); String str3 = new String("Roll"); String str4 = new String("Roll"); System.out.println("Comparing " + str1 + " and " + str2 + " : " + str1.compareTo(str2)); //Comparing String 3 = String 4 System.out.println("Comparing " + str3 + " and " + str4 + " : " + str3.compareTo(str4)); System.out.println("Comparing " + str2 + " and " + str4 + " : " + str2.compareTo(str4)); } } Output: Comparing Rock and Pop :2 Comparing Roll and Roll :0 Comparing Pop and Roll :-2 This brings us to the final bit of this comparing two strings in Java article, Using Double Equal To OperatorThis method should be avoiding while comparing two string values. The major differences between the equals() and == operator is given below:
== operator is avoided, since it checks for reference equality, i.e. if the strings point to the same object or not. Code import java.util.*; public class Main { public static void main(String[] args) { String str1 = new String("Rock"); String str2 = new String("Rock"); System.out.println(str1 == str2); System.out.println(str1.equals(str2)); } } Output: false true The methods mentioned in the article provide a meticulous way to compare two strings in the programming language of java. Thus we have come to an end of this article on ‘Array Of Objects in Java’. If you wish to learn more, check out the Java Online Training by Edureka, a trusted online learning company. Edureka’s Java J2EE and SOA training and certification course is designed to train you for both core and advanced Java concepts along with various Java frameworks like Hibernate & Spring. Got a question for us? Please mention it in the comments section of this article and we will get back to you as soon as possible. Which is the string method used to compare two strings with each other in C#?In C#, Equals(String, String) is a String method. It is used to determine whether two String objects have the same value or not. Basically, it checks for equality. If both strings have the same value, it returns true otherwise returns false.
Which is the string method used to compare two strings with each other * A compare to () b Compare () C Copy () d concat ()?The C# Compare() method is used to compare first string with second string lexicographically. It returns an integer value. If both strings are equal, it returns 0.
Can we compare two strings using == in Java?To compare these strings in Java, we need to use the equals() method of the string. You should not use == (equality operator) to compare these strings because they compare the reference of the string, i.e. whether they are the same object or not.
Which of the following methods can be used to check the equality of two strings?Java String equals() Method
The equals() method compares two strings, and returns true if the strings are equal, and false if not.
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