Basic Java examples

1.java

public class Test1 {
	public static void main(String[] args) {
//		Array iteration
		
		int[][] b;
		b = new int[3][2];
		
		// Value assigne
		b[0][0] = 56;
		b[0][1] = 56;

		b[1][0] = 44;
		b[1][1] = 56;
		
		b[2][0] = 56;
		b[2][1] = 56;
		
//		int[][] b = {{1, 3}, {5 ,8}, {77, 88}};
		int row = 3;
		int col = 2;
		int[][] temp = new int[3][2];
		
		for(int i = 0; i<row; i++) {
			
			for(int j = 0; j<col; j++) {
				
//				temp[i][j] == b[i][j]  				
			}	
		}	
	}
}

10.java

// return Max number
public class Test1 {
	public static void main(String[] args) {

		System.out.println( findMax(10, 5) );
		System.out.println( findMax(100, 200) );
	}
	
	public static int findMax(int a, int b) {
		
		if(a > b) {
			return a;
		} else {
			return b;
		}
	}
}

11.java

// Method overloading example: 
// Find and print the Area
public class Test1 {
	public static void main(String[] args) {

		printArea(7, 9);
		printArea(9);
	}

	public static void printArea(int a, int b) {
		System.out.println(a * b);
	}

	public static void printArea(int a) {
		System.out.println(a * a);
	}
}

12.java

// find and return Max number
public class Test1 {
	public static void main(String[] args) {

		System.out.println( findMax(10, 5) );
		System.out.println( findMax(100, 200) );
		System.out.println( findMax(1.5f, 2.5f) );

	}
	
	public static int findMax(int a, int b) {
		
		if(a > b) {
			return a;
		} else {
			return b;
		}
	}

	public static float findMax(float a, float b) {
		
		if(a > b) {
			return a;
		} else {
			return b;
		}
	}
}

13.java

// Error code
public class Test1 {
	public static void main(String[] args) {
		int num = 5;
		System.out.println(num);
	}
	public static void m1(){
		double num2 = 6.28;
		System.out.println(num2);
		System.out.println(num);
	}
}

2.java

public class Test1 {
	public static void main(String[] args) {

		// Declaration
		int[] a;
		int[][] b;
//		int[][] f;		
		
		// Assignment or initialize
		a = new int[5];
		b = new int[3][2];
//		f = { {56, 12, 55}, {55, 66, 12} };
		
		// initialization
		int[] d = new int[5];
		int[] c = {45, 56, 67};
		int[][] f = { {56, 12, 55}, {55, 66, 12} };
		
		// Value assignment
		b[0][0] = 56;
		b[0][1] = 56;

		b[1][0] = 44;
		b[1][1] = 56;
		
		b[2][0] = 56;
		b[2][1] = 56;
		
	}
}

3.java

public class Test1 {

	public static void counter(){
		
		for (int x = 1; x <= 5; x++) {
			System.out.println(x);
		}	
		
	}

	public static void main(String[] args) {

		counter();
	}
}

4.java

public class Test1 {
	
	public static void main(String[] args) {
		
		int num = five();

		System.out.println(num);

	}

	public static int five() {
		
		int num = 5;
		
		return num;
		
	}
	
}

5.java

public class Test1 {
	
	public static int add(int x, int y) {
	
		return x + y;
		
	}
	
	public static void main(String[] args) {

		int z;
		
		z = add(150, 100);
        System.out.println(z);

	}
}

6.java

public class Test1 {
	public static void printEidBonus(int x)
    {
        x = x*2;
        System.out.print(x);
    }
	public static void main(String[] args) {

		printEidBonus(15000);

	}
}

7.java

public class Test1 {
	public static int findEidBonusWithSalaries(int x)
    {
        x = x*2;
        
        return x;
    }
	public static void main(String[] args) {

		int z;
		
		z = findEidBonusWithSalaries(15000);
        System.out.println("Bonus with the Salaries is: " + z);

	}
}

8.java

// Find and print the Area
public class Test1 {
	public static void main(String[] args) {

		printArea(7, 9);
	}

	public static void printArea(int a, int b) {
		System.out.println(a * b);
	}
}

9.java

// Find and print Even/Odd numbre
public class Test1 {
	public static void main(String[] args) {

		printEvenOdd(5);
		printEvenOdd(8);
	}
	
	public static void printEvenOdd(int a) {
		
		if(a / 2  == 0) {
			System.out.print("The number is Even.");
		} else {
			System.out.print("The number is Odd.");
		}
		
	}
}