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- import java.util.ArrayList;
- import javax.swing.JOptionPane;
- public class Arrays {
- public static void main(String[] args) {
- JOptionPane.showMessageDialog(null,"Garrett Johnston\nWeek08");
- String output="";
- int[] x;
- x = new int[5];
- x[1] = 13;
- x[4] = 8;
- x[0] = 3;
- x[2] = 5;
- JOptionPane.showMessageDialog(null, "A new int array called x was just created.\nIt was loaded with the following numbers: 13, 8, 3, 5.\nTake a look:");
- for (int i= 0; i<x.length; i++) {
- output = output + "x[" + i + "]= " + x[i] + "\n";
- }
- JOptionPane.showMessageDialog(null, output);
- output = "";
- JOptionPane.showMessageDialog(null, "Now I will create an array called z and set it to have 14 locations.");
- JOptionPane.showMessageDialog(null, "Each location will hold the value of its location squared plus 7 times its location added to 12");
- int n = 14;
- double[] z = new double[n];
- for (int i=0; i<z.length; i++) {
- z[i] = i*i - 7*i + 12;
- }
- for (int i=0; i<z.length; i++) {
- z[i] = i*i - 7*i + 12;
- output = output + "z[" + i + "]= " + z[i] + "\n";
- }
- JOptionPane.showMessageDialog(null, output);
- ArrayList<Rectangle> r = new ArrayList<Rectangle>();
- r.add(new Rectangle());
- r.add(new Rectangle());
- System.out.println("from arraylist: " + r.get(1).getLength());
- ArrayList<Double> dd = new ArrayList<Double>();
- dd.add(4.5);
- for (int i=1; i<=10;i++) dd.add((Double)(double) i);
- for (int i=0; i<dd.size();i++) {
- System.out.println("Arraylist sub " + i + " = " + dd.get(i));
- }
- }
- public static double min(double... x){
- double theMin;
- theMin = x[0];
- for (int i=1; i<x.length; i++) {
- if (x[i] < theMin) theMin = x[i];
- }
- return theMin;
- }
- public static double[] getArrayOf(int n) {
- double [] z = new double[n];
- for (int i=0;i<n;i++) z[i] = i+1;
- return z;
- }
- public static void displayArray(boolean[] a) {
- System.out.println("Boolean version");
- for (int i=0; i<a.length;i++) {
- System.out.println("array[" + i + "] = " +a[i]);
- }
- //a = new double[15];
- //a[0] = true;
- }
- public static void displayArray(double[] a) {
- System.out.println("Double version");
- for (int i=0; i<a.length;i++) {
- System.out.println("array[" + i + "] = " +a[i]);
- }
- //a = new double[15];
- //a[0] = 133.0;
- }
- }
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