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If your method isRight() is supposed to to compute the answer from 3 floating point values, it will never work, because as others have pointed out you will get inaccuracies in your calculations. We use JFrame to create a top-level container, and then add a panel, which is our DrawATriangle class that extends JPanel, to it.. As shown in the code below, we call the drawPolygon method inside the paintComponent to create a triangle on the Graphics object g.. The right triangle formula can be expressed as follows, The hypotenuse square is equal to the sum of the base square and the altitude square. Print the character in the inner loop that is used to print the triangle. As we know that N th row contains N elements from 1 to N. Hence, inner for loop will iterate from N times (j = 1 to N). Java program to print Hollow right triangle star pattern program - We have written below the print/draw Hollow right triangle asterisk/star pattern program in four different ways with sample example and output, check it out. Avoiding alpha gaming when not alpha gaming gets PCs into trouble, How to properly analyze a non-inferiority study, Cannot understand how the DML works in this code. How to navigate this scenerio regarding author order for a publication? Similarly, the number of spaces required is also taken from command line and this is used in between printing the '*' symbol. As logic to print a left oriented triangle with asterisks in Java, we will create a loop that will iterate the number of rows that the user wants for the triangle. 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