JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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How to compare two String objects in java?


Description:

The below example shows how to compare two string objects in java. You can not use "==" operator to compare two strings. String provides equals() method to compare two string objects. Also you can ignore case during string compare by calling equalsIgnoreCase() method. '==' operator compares the object reference but not the string value.


Code:
package com.myjava.string;

public class MyStringEquals {
    public static void main(String a[]){
        String x = "JUNK";
        String y = "junk";
        /**
         * We cannot use '==' operator to compare two strings.
         * We have to use equals() method.
         */
        if(x.equals(y)){
            System.out.println("Both strings are equal.");
        } else {
            System.out.println("Both strings are not equal.");
        }
        /**
         * We can ignore case with equalsIgnoreCase() method
         */
        if(x.equalsIgnoreCase(y)){
            System.out.println("Both strings are equal.");
        } else {
            System.out.println("Both strings are not equal.");
        }
    }
}

Example Output

Both strings are not equal.
Both strings are equal.

Other String Function Examples

Knowledge Centre
wait Vs sleep methods
sleep(): It is a static method on Thread class. It makes the current thread into the "Not Runnable" state for specified amount of time. During this time, the thread keeps the lock (monitors) it has acquired.

wait(): It is a method on Object class. It makes the current thread into the "Not Runnable" state. Wait is called on a object, not a thread. Before calling wait() method, the object should be synchronized, means the object should be inside synchronized block. The call to wait() releases the acquired lock.
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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java is registered trademark of Oracle.
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