asdf913’s gists

asdf913 / ProcessIdPortMultimap.java

Created May 8, 2026 07:30

Get the mulitmap of Process Id and it opened port number.

	import java.io.IOException;
	import java.io.InputStream;
	import java.nio.charset.StandardCharsets;
	import java.nio.file.FileSystems;
	import java.util.List;
	import java.util.Objects;
	import java.util.regex.Matcher;
	import java.util.regex.Pattern;

	import org.apache.commons.collections4.IterableUtils;

asdf913 / StringArrayToMap.java

Created May 8, 2026 01:12

Convert a String array into a java.util.Map

	import java.util.Arrays;
	import java.util.LinkedHashMap;
	import java.util.Map;
	import java.util.Objects;

	import org.apache.commons.lang3.ArrayUtils;
	import org.apache.commons.lang3.ObjectUtils;
	import org.apache.commons.lang3.StringUtils;

	public class StringArrayToMap {

asdf913 / InetSocketAddressCheckPort.class

Created May 7, 2026 12:59

Retrieve the allowed minimum and maximum port number defined in "checkPort()" in "java.net.InetSocketAddress" class

	import java.io.IOException;
	import java.io.InputStream;
	import java.lang.reflect.Field;
	import java.net.InetSocketAddress;
	import java.util.Arrays;

	import org.apache.bcel.classfile.ClassParser;
	import org.apache.bcel.classfile.ConstantPool;
	import org.apache.bcel.classfile.FieldOrMethod;
	import org.apache.bcel.classfile.JavaClass;

asdf913 / WhichOrWhere.java

Last active May 7, 2026 10:15

Use "which" or "where" to determine if a command is valid. Also print the path of the corresponding executable of the command. Print the actual path if the path is a link

	import java.io.File;
	import java.io.IOException;
	import java.io.InputStream;
	import java.nio.charset.StandardCharsets;
	import java.nio.file.FileSystems;
	import java.util.Objects;
	import java.util.function.Predicate;

	import org.apache.commons.io.IOUtils;
	import org.apache.commons.lang3.StringUtils;

asdf913 / DocxToRubyHTML.java

Created May 4, 2026 05:25

Docx Document to generate Ruby HTML

	import java.io.ByteArrayInputStream;
	import java.io.IOException;
	import java.io.InputStream;
	import java.lang.reflect.Proxy;
	import java.util.Base64;
	import java.util.Base64.Decoder;
	import java.util.Collection;
	import java.util.List;
	import java.util.Objects;
	import java.util.function.Function;

asdf913 / GetFontFilePaths.java

Created March 6, 2026 21:46

Get Font File Paths. This program will invoke native function based on the operating system.

	package test2;

	import java.io.File;
	import java.net.URI;
	import java.net.URISyntaxException;
	import java.nio.file.FileSystems;
	import java.nio.file.Path;
	import java.util.ArrayList;
	import java.util.Arrays;
	import java.util.Collection;

asdf913 / gist:dce24d35cfb609e1aaac77d0bb1cca0b

Created June 5, 2025 08:29

Swap Value From Two Variables Without Temporary Variable

	public class SwapValueFromTwoVariablesWithoutTemporaryVariable {

	public static void main(final String[] args) {
	//
	int a = 10;
	//
	int b = 2;
	//
	System.out.println("a=" + a + ",b=" + b);
	//

asdf913 / JptExamMarkSheetExcel.java

Last active March 20, 2025 12:29

JPT Exam Mark Sheet (xlsx)

	import java.io.File;
	import java.io.FileOutputStream;
	import java.io.IOException;
	import java.io.OutputStream;
	import java.util.Arrays;
	import java.util.Collection;
	import java.util.List;
	import java.util.Objects;

	import org.apache.commons.lang3.StringUtils;

asdf913 / ChopImage.java

Created February 13, 2025 12:03

Chop Image by Java

	import java.awt.image.BufferedImage;
	import java.io.ByteArrayInputStream;
	import java.io.File;
	import java.io.IOException;
	import java.io.InputStream;
	import java.nio.file.Files;
	import java.util.Base64;
	import java.util.Base64.Decoder;
	import java.util.Collection;
	import java.util.function.ObjIntConsumer;

asdf913 / Main.java

Last active February 11, 2025 06:33

Check if string is plain text or not

	import java.lang.reflect.Field;
	import java.util.Arrays;
	import java.util.List;
	import java.util.Objects;
	import java.util.function.Predicate;

	import org.apache.commons.collections4.IterableUtils;
	import org.apache.commons.lang3.ArrayUtils;
	import org.apache.commons.lang3.StringUtils;
	import org.apache.commons.lang3.function.FailableFunction;