alignright.java

一个一元曲线多项式数值演示例子

package numbercruncher.mathutils;

/**
 * Print text and numbers right-aligned in columns.
 */
public class AlignRight {
  /** line size */
  private int lineSize;

  /**
   * Constructor.
   */
  public AlignRight() {}

  /**
   * Print text right-aligned in the column.
   * @param text the text to print
   * @param width the column width
   */
  public void print(String text, int width) {
    int padding = width - text.length();
    while (--padding >= 0) {
      System.out.print(" ");
    }
    System.out.print(text);

    lineSize += width;
  }

  /**
   * Print an integer value right-aligned in the column.
   * @param value the value to print
   * @param width the column width
   */
  public void print(int value, int width) {
    print(Integer.toString(value), width);
  }

  /**
   * Print a float value right-aligned in the column.
   * @param value the value to print
   */
  public void print(float value, int width) {
    print(Float.toString(value), width);
  }

  /**
   * Print a double value right-aligned in the column.
   * @param value the value to print
   * @param width the column width
   */
  public void print(double value, int width) {
    print(Double.toString(value), width);
  }

  /**
   * Print a line.
   */
  public void println() {
    System.out.println();
    lineSize = 0;
  }

  /**
   * Print an underline.
   */
  public void underline() {
    System.out.println();
    for (int i = 0; i < lineSize; ++i) {
      System.out.print("-");
    }
    System.out.println();
    lineSize = 0;
  }
}