System.clearProperty(String key) method enables you to remove a system property. The key must not be an empty string or a null value because it will cause the method to throw an IllegalArgumentException or a NullPointerException.

It will also check if a SecurityManager exists and if you don’t have a write permission to the system property a SecurityException is going to be thrown.

package org.kodejava.example.lang;

public class ClearProperty {
    public static void main(String[] args) {
        String key = "user.dir";

        //
        // The System.clearProperty() method available in Java 1.5
        //
        System.clearProperty(key);
    }
}

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Wayan Saryada

Programmer, runner, recreational diver, live in the island of Bali, Indonesia 🇮🇩. Mostly programming in Java, creating web based application with Spring Framework, Hibernate / JPA.

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