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Selection Sort Java Program

 import java.util.*; public class cf  { static Scanner input = new Scanner(System.in); public static void main(String[] args){ System.out.println("Enter the length of array"); int n=input.nextInt(); System.out.println("Now Enter the elements to sort"); int[] arr = new int[n]; for(int k=0;k<n;k++) { arr[k] = input.nextInt(); } for(int i=0;i<n-1;i++){ for(int j=i+1;j<n;j++) { if(arr[j]<arr[i]){ int temp = arr[j]; arr[j] = arr[i]; arr[i] = temp; } } } for(int aa : arr) System.out.print(aa+" "); System.out.println("\n count="+count); } }
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java:17: error: local variables referenced from a lambda expression must be final or effectively final count ++ ;

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 Modifying variables inside java lambdas. Integer list[] = {1,2,3,4,5,6,7,8}; int index = 0; Arrays.asList(list).forEach(e -> { System.out.println(e+" at index "+index); index++; }); Error : maze2.java:22: error: local variables referenced from a lambda expression must be final or effectively final System.out.println(e+" at index "+index); ^ maze2.java:23: error: local variables referenced from a lambda expression must be final or effectively final index++; ^ Solution : Integer list[] = {1,2,3,4,5,6,7,8}; int[] index = {0}; Arrays.asList(list).forEach(e -> { System.out.println(e+" at index "+index[0]); index[0]++; }); Output : 1 at index 0 2 at index 1 3 at index 2 4 at index 3 5 at index 4 6 at index 5 7 at index 6 8 at index 7
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Family Tree Project in Java

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Creating Family tree in java .  Trees are such an important structure in computer science. But what more important tree, than our family tree? ❤️   👨‍👩‍👧‍👦   ❤️    Made this simple program in java to implement family tree. Java File import java.util.*; class Person { String name; boolean married; String wife; int noOfChild; Person[] childs; public Person(String name){ this.name = name; } public Person(String name,boolean married,String wife,Person[] childs,int noOfChild) { this.name = name; this.married = married; this.wife = wife; this.childs = childs; this.noOfChild = noOfChild; } public Person(String name , boolean married,String wife) { this.name = name; this.married = married; this.wife = wife; } } class familyTree { static int population; static Scanner input = new Scanner...
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Creating basic tic tac toe android app using java

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 Marvel Tic Tac Toe Android Game ( Java ) In this blog I we will create basic android app. We will be coding in java.   package com.example.batvsiron ; import androidx.appcompat.app.AppCompatActivity ; import android.os.Bundle ; import android.util.Log ; import android.view.View ; import android.widget.Button ; import android.widget.GridLayout ; import android.widget.ImageView ; import android.widget.TextView ; import android.widget.Toast ; import java.util.Arrays ; public class MainActivity extends AppCompatActivity { int active = 0 ; public int [][] winningPosition = { { 0 , 1 , 2 } , { 3 , 4 , 5 } , { 6 , 7 , 8 } , { 0 , 3 , 6 } , { 1 , 4 , 7 } , { 2 , 5 , 8 } , { 0 , 4 , 8 } , { 2 , 4 , 6 } } ; public int [] moves = { 111 , 111 , 111 , 111 , 111 , 111 , 111 , 111 , 111 } ; public int checkWinning () { for ( int [] arr : winningPosition ) { ...
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