Java 17 Recipes

 Solution
Use the built-in equals(), equalsIgnoreCase(), compareTo(), and 
compareToIgnoreCase() methods to compare the values contained within the strings. 
The following is a series of tests using different string-comparison operations.
As you can see, various if statements are used to print messages if the comparisons 
are equal.
String one = "one";
String two = "two";
String var1 = "one";
String var2 = "Two";
String pieceone = "o";
String piecetwo = "ne";
// Comparison is equal
if (one.equals(var1)){
System.out.println ("String one equals var1 using equals");
}
Chapter 3 StringS

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82
// Comparison is NOT equal
if (one.equals(two)){
System.out.println ("String one equals two using equals");
}
// Comparison is NOT equal
if (two.equals(var2)){
System.out.println ("String two equals var2 using equals");
}
// Comparison is equal, but is not directly comparing String values 
using ==
if (one == var1){
System.out.println ("String one equals var1 using ==");
}
// Comparison is equal
if (two.equalsIgnoreCase(var2)){
System.out.println ("String two equals var2 using equalsIgnoreCase");
}
String piecedTogether = pieceone + piecetwo;
// Comparison is equal
if (one.equals(piecedTogether)){
System.out.println("The strings contain the same value using equals");
}
// Comparison is NOT equal using ==
if (one == piecedTogether) {
System.out.println("The string contain the same value using == ");
}
// Comparison is equal
if (one.compareTo(var1) == 0){
System.out.println("One is equal to var1 using compareTo()");
}
if (one.compareToIgnoreCase(var1) == 0){
System.out.println("One is equal to var1 using compareToIgnoreCase()");
}
Chapter 3 StringS

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83
Results in the following output.
String one equals var1 using equals
String one equals var1 using ==
String two equals var2 using equalsIgnoreCase
The Strings contain the same value using equals
One is equal to var1 using compareTo()
One is equal to var1 using compareToIgnoreCase()