Java Reference
In-Depth Information
Try It Out - String Identity
Make the following changes to the
MatchStrings.java
file of the previous example:
public class MatchStrings {
public static void main(String[] args) {
String string1 = "Too many ";
String string2 = "cooks";
String string3 = "Too many cooks";
// Make string1 and string3 refer to separate strings that are identical
string1 += string2;
// Display the contents of the strings
System.out.println("Test 1");
System.out.println("string3 is now: " + string3);
System.out.println("string1 is now: " + string1);
if(string1.equals(string3)) // Now test for equality
System.out.println("string1.equals(string3) is true." +
" so strings are equal.");
else
System.out.println("string1.equals(string3) is false." +
" so strings are not equal.");
// Now make string1 and string3 refer to strings differing in case
string3 = "TOO many cooks";
// Display the contents of the strings
System.out.println("\n\nTest 2");
System.out.println("string3 is now: " + string3);
System.out.println("string1 is now: " + string1);
if(string1.equals(string3)) // Compare for equality
System.out.println("string1.equals(string3) is true " +
" so strings are equal.");
else
System.out.println("string1.equals(string3) is false" +
" so strings are not equal.");
if(string1.equalsIgnoreCase(string3)) // Compare, ignoring case
System.out.println("string1.equalsIgnoreCase(string3) is true" +
" so strings are equal ignoring case.");
else
System.out.println("string1.equalsIgnoreCase(string3) is false" +
" so strings are different.");
}
}
If you run this example, you should get the output:
Test 1
string3 is now: Too many cooks
