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Three numbers x, y and z are given and the largest number among these three numbers can be found out using below methods.

Method 1: Using If statement

In the below example, only if conditional statements are used.

public class MyClass {
  static void largest(int x, int y, int z) {
    int max = x;

    if (x >= y && x >= z)
      max = x;
    if (y >= x && y >= z)
      max = y;
    if (z >= x && z >= y)
      max = z;
    System.out.println("largest number among " + x + ", " + 
                        y + " and " + z + " is: " + max);
  }

  public static void main(String[] args) {
    largest(100, 50, 25);
    largest(50, 50, 25);
  }
}

The above code will give the following output:

largest number among 100 , 50 and 25 is:  100
largest number among 50 , 50 and 25 is:  50

Method 2: Using If-else statement

It can also be solved using If-else conditional statements.

public class MyClass {
  static void largest(int x, int y, int z) {
    int max = x;

    if (x >= y && x >= z)
      max = x;
    else if (y >= x && y >= z)
      max = y;
    else 
      max = z;

    System.out.println("largest number among " + x + ", " + 
                        y + " and " + z + " is: " + max);
  }

  public static void main(String[] args) {
    largest(100, 50, 25);
    largest(50, 50, 25);
  }
}

The above code will give the following output:

largest number among 100 , 50 and 25 is:  100
largest number among 50 , 50 and 25 is:  50

Method 3: Using Nested If-else statement

The above problem can also be solved using nested if-else conditional statements.

public class MyClass {
  static void largest(int x, int y, int z) {
    int max = x;
    
    if (x >= y) {
      if(x >= z) 
        max = x;
      else
        max = z;
    }
    else {
      if(y >= z) 
        max = y;
      else
        max = z;
    }
    
    System.out.println("largest number among " + x + ", " + 
                        y + " and " + z + " is: " + max);
  }

  public static void main(String[] args) {
    largest(100, 50, 25);
    largest(50, 50, 25);
  }
}

The above code will give the following output:

largest number among 100 , 50 and 25 is:  100
largest number among 50 , 50 and 25 is:  50

Method 4: Using ternary operator

The ternary operator can also be used here.

public class MyClass {
  static void largest(int x, int y, int z) {
    int max = x;
    max = (x > y)? ((x > z)? x : z) : ((y > z)? y : z);
    System.out.println("largest number among " + x + ", " + 
                        y + " and " + z + " is: " + max);
  }

  public static void main(String[] args) {
    largest(100, 50, 25);
    largest(50, 50, 25);
  }
}

The above code will give the following output:

largest number among 100 , 50 and 25 is:  100
largest number among 50 , 50 and 25 is:  50