Blue Breeze

package org.example.reflect; import java.util.Enumeration; import java.util.Properties; class A {} public class isInstance { public static void main(String[] args) { try { Class klass = Class.forName(isInstance.class.getPackage().getName() + ".A"); Boolean isInstance1 = klass.isInstance(new Integer(37)); System.out.println("isInstance1 isInstance klass: " + isInstance1); Boolean isInstance2 = kl..

package org.example.environment; import java.util.Map; public class Env { public static void main(String[] args){ Map envs = System.getenv(); for(String key: envs.keySet()){ System.out.printf("System.getenv(\"%s\"): %s\n", key, System.getenv(key)); } } } > Task :Env.main() System.getenv("USERDOMAIN_ROAMINGPROFILE"): USERGROUP System.getenv("PROCESSOR_LEVEL"): 6 System.getenv("SESSIONNAME"): Cons..

package org.example; import java.util.Optional; public class OptionalTest { public static void main(String[] args) { System.out.println("Hello world!"); for (int i : new int[]{0, 1}) { System.out.println(i); } Object val; boolean is; val = Optional.of("ABCD").filter(v -> v.startsWith("AB")).orElse("Not AB"); System.out.println(val); val = Optional.of("XYZ").filter(v -> v.startsWith("AB")).orElse..

package org.example; import java.time.Instant; import java.time.LocalDateTime; import java.time.OffsetDateTime; import java.time.ZoneOffset; import java.time.format.DateTimeFormatter; public class DatetimeOffset { public static void main(String[] args){ // this simulates the parameters passed to your method String offset = "+07:00"; String date = "2019-11-05 16:00"; // provide a pattern String f..