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Java 2021-08-27 22:52:01
read csv java android
import com.opencsv.CSVReader; import java.io.IOException; import java.io.FileReader; ... try { CSVReader reader = new CSVReader(new FileReader("yourfile.csv")); String[] nextLine; while ((nextLine = reader.readNext()) != null) { ... Add solution -
Java 2021-08-27 20:24:02
TreeMap lowerEntry(K key) method in java
import java.util.Map; import java.util.TreeMap; public class TreeMapLowerEntryMethodExample { public static void main(String[] args) { try { TreeMap<Integer, String> tm = new TreeMap<Integer, String>(); tm.p... Add solution -
Java 2021-08-27 17:29:01
check if string has special characters java
//1. Using Regex import java.util.regex.Matcher; import java.util.regex.Pattern; public class JavaHungry { public static void main(String args[]) { String inputString = "Alive*is*Awesome$"; Pattern pattern = Pattern.compi... Add solution -
Java 2021-08-27 12:56:02
Java program to convert decimal number to binary & count number of 1s
// decimal to binary conversion in java import java.util.Scanner; public class DecimalBinaryDemo { public static void main(String[] args) { int number, count = 0, temp; String strConvert = ""; Scanner sc = new Scanner(Sys... Add solution -
Other 2021-08-27 11:40:02
Given an array of integers arr, write a function that returns true if and only if the number of occurrences of each value in the array is unique. using hashmap
import java.util.*; class Solution { public boolean uniqueOccurrences(int[] arr) { HashMap<Integer,Integer> hash = new HashMap<>(); for(int i = 0;i<arr.length;i++){ if(hash.containsKey(arr[i])){ ... Add solution -
Java 2021-08-27 11:20:01
jscrollpane
// Dont forget the packagae import java.awt.Color; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTextArea; import javax.swing.border.Border; import javax.swing.border.LineBorder; public class JS... Add solution -
Java 2021-08-27 08:39:01
java usaco code
/* Use the slash-star style comments or the system won't see your identification information */ /* ID: your_id_here LANG: JAVA TASK: test */ import java.io.*; import java.util.*; class test { public static void main (String [] args) throws IOExcepti... Add solution -
Java 2021-08-26 11:04:01
make a get request call using HttpClient in java
package com.zetcode; import com.fasterxml.jackson.databind.ObjectMapper; import java.io.IOException; import java.net.URI; import java.net.http.HttpClient; import java.net.http.HttpRequest; import java.net.http.HttpResponse; import java.util.HashMap; pu... Add solution
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