[백준] JAVA 2557: Hello World

 

https://www.acmicpc.net/problem/2557

2557번: Hello World

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Solution1: System.out.print

public class Main {
	public static void main(String[] args) {
    
		System.out.print("Hello World!");
	}
}

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Solution2: BufferdWriter

import java.io.BufferedWriter;
import java.io.IOException;
import java.io.OutputStreamWriter;

public class Main {
	public static void main(String[] args) throws IOException {
		
		BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
		
		bw.write("Hello World!");
		bw.flush();
		bw.close();
	}
}

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Solution3: StringBuilder

public class Main {
	public static void main(String[] args) {
		
		StringBuilder sb = new StringBuilder();
		sb.append("Hello World!");
		System.out.print(sb);
	}
}

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