package in.bench.resources.java8.string.methods;

import java.util.stream.Stream;

public class CheckWordIsPresentInString {

	public static void main(String[] args) {

		// string 
		String str = "Welcome to BenchResources.Net weblog";


		// 1. check word "BenchRes" is present or not
		boolean boolSearch1 = Stream.of(str).anyMatch(s -> s.contains("BenchRes"));
		System.out.println("Word \"BenchRes\" present ? = " + boolSearch1);


		// 2. check word "tech" is present or not
		boolean boolSearch2 = Stream.of(str).anyMatch(s -> s.contains("tech"));
		System.out.println("Word \"tech\" present ? = " + boolSearch2 + "\n\n");


		// 3. exception scenario for null
		boolean boolSearch3 = Stream.of(str).anyMatch(s -> s.contains(null));
		System.out.println("null present ? = " + boolSearch3);
	}
}

Word "BenchRes" present ? = true
Word "tech" present ? = false


Exception in thread "main" java.lang.NullPointerException: Cannot invoke 
"java.lang.CharSequence.toString()" because "s" is null
	at java.base/java.lang.String.contains(String.java:2851)
	at in.bench.resources.java8.string.methods.CheckWordIsPresentInString
.lambda$2(CheckWordIsPresentInString.java:24)
	at java.base/java.util.stream.MatchOps$1MatchSink.accept(MatchOps.java:90)
	at java.base/java.util.stream.Streams$StreamBuilderImpl.tryAdvance(Streams.java:397)
	at java.base/java.util.stream.ReferencePipeline.forEachWithCancel(ReferencePipeline.java:129)
	at java.base/java.util.stream.AbstractPipeline.copyIntoWithCancel(AbstractPipeline.java:527)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:513)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
	at java.base/java.util.stream.MatchOps$MatchOp.evaluateSequential(MatchOps.java:230)
	at java.base/java.util.stream.MatchOps$MatchOp.evaluateSequential(MatchOps.java:196)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.ReferencePipeline.anyMatch(ReferencePipeline.java:632)
	at in.bench.resources.java8.string.methods.CheckWordIsPresentInString
.main(CheckWordIsPresentInString.java:24)