Comparing Strings with buildin methods

Introduction

Use the built-in equals(), equalsIgnoreCase(), compareTo(), and compareToIgnoreCase() methods to compare the String values.

Demo Code

public class Main {
    public static void main(String[] args){
        String one = "one";
        String two = "two";

        String var1 = "one";
        String var2 = "Two";

        String pieceone = "o";
        String piecetwo = "ne";
        //from   www .ja  va2  s . c  om
        if (one.equals(var1)){
            System.out.println ("String one equals var1 using equals");
        }

        if (one.equals(two)){
            System.out.println ("String one equals two using equals");
        }

        if (two.equals(var2)){
            System.out.println ("String two equals var2 using equals");
        }

        if (one == var1){
            System.out.println ("String one equals var1 using ==");
        }

        if (two.equalsIgnoreCase(var2)){
            System.out.println ("String two equals var2 using equalsIgnoreCase");
        }

        System.out.println("Trying to use == on Strings that are pieced together");

        String piecedTogether = pieceone + piecetwo;

        if (one.equals(piecedTogether)){
            System.out.println("The strings contain the same value using equals");
        }

        if (one == piecedTogether) {
            System.out.println("The string contain the same value using == ");
        }

        if (one.compareTo(var1) == 0){
            System.out.println("One is equal to var1 using compareTo()");
        }
        
        System.out.println("Comparision Using regionMatches");

        String sentence = "Java 8 is great!";
        String matchStr = "great";
        for(int i=0; i <= sentence.length()-1; i++){
            if (sentence.regionMatches(i, matchStr, 0, matchStr.length())){
                System.out.println("The sentence: '" + sentence + "' matches: '" +
                        matchStr + "' beginning at index: " + i);
            }
        }               
    }
}

Comparing Strings with buildin methods - Java Language Basics

Introduction

Demo Code

Result

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