我正在开发一个选择排序测试程序。它需要一组随机数(20-100)并绘制它们,当您运行程序时,会显示一个框架,其中根据随机数绘制线条,当您单击面板时,线条将按选择排序排序。这是点击之前和点击之后的样子。
我已经得到了它,我可以让它随机打印,就像第一张图像,或者排序,就像第二张图像。但我无法弄清楚鼠标点击的情况。我以为我的代码在这里是正确的,但我想不是。 感谢任何帮助,谢谢。
import java.awt.Graphics;
import java.util.Random;
/**
*
* @author matthewtingle
*/
public class AnimatedSelectionSortPanel extends javax.swing.JPanel {
private static final int NUMBER_INDEXES = 50;
private static int[] number = new int[NUMBER_INDEXES];
/**
* Creates new form AnimatedSelectionSortPanel
*/
public AnimatedSelectionSortPanel() {
initComponents();
loadArray();
for(int i = 0; i < NUMBER_INDEXES; i++){
if(i%10==0){
System.out.println("");
System.out.print("" + number[i]+", ");
}else{
System.out.print("" + number[i]+", ");
}
}
}
@Override
public void paintComponent(Graphics g) {
System.out.println("");
drawPass(g);
for (int i = 0; i < NUMBER_INDEXES; i++){
if(i%10==0){
System.out.println("");
System.out.print(""+ number[i]+ ", ");
}else{
System.out.print(""+ number[i]+ ", ");
}
}
}
private void loadArray() {
Random rnd = new Random();
for (int i = 0; i < NUMBER_INDEXES; i++) {
number[i] = rnd.nextInt((100 - 20) + 1) + 20;
}
}
public void drawPass(Graphics g) {
int xBasePosition = 10;
int yBasePosition = 100;
for (int i = 0; i < NUMBER_INDEXES; i++) {
g.drawLine(xBasePosition,yBasePosition+20, xBasePosition, yBasePosition - number[i]);
xBasePosition+=10;
}
}
public void selectionSort(){
for(int top = 0; top <= number.length - 2; top++){
int minIndex = top;
for (int i = top + 1; i <= number.length - 1; i++) {
if (number[i] < number[minIndex]) {
minIndex = i;
}
}swapElements(top,minIndex);
}
}
private void swapElements(int index1, int index2){
int tmp = number[index1];
number[index1] = number[index2];
number[index2] = tmp;
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jPanel1 = new javax.swing.JPanel();
jPanel1.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(java.awt.event.MouseEvent evt) {
jPanel1MouseClicked(evt);
}
});
javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 500, Short.MAX_VALUE)
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 150, Short.MAX_VALUE)
);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this);
this.setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
);
}// </editor-fold>
private void jPanel1MouseClicked(java.awt.event.MouseEvent evt) {
selectionSort();
repaint();
}
// Variables declaration - do not modify
private javax.swing.JPanel jPanel1;
// End of variables declaration
}
最佳答案
我尝试将此面板添加到框架中,但它甚至没有显示,除非我注释掉“initComponents”方法中的内容。我猜有问题,但是这个自动生成的代码不可读。我假设 jPanel1
(添加了鼠标监听器)未正确放置。您可以直接将鼠标监听器添加到动画面板。但是,这是 SSCCE:
import java.awt.Graphics;
import java.awt.GridLayout;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.Random;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
/**
*
* @author matthewtingle
*/
public class AnimatedSelectionSortPanel extends javax.swing.JPanel {
private static final int NUMBER_INDEXES = 50;
private static int[] number = new int[NUMBER_INDEXES];
public static void main(String[] args)
{
SwingUtilities.invokeLater(new Runnable()
{
@Override
public void run()
{
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.getContentPane().setLayout(new GridLayout(1,1));
f.getContentPane().add(new AnimatedSelectionSortPanel());
f.setSize(600,300);
f.setLocationRelativeTo(null);
f.setVisible(true);
}
});
}
/**
* Creates new form AnimatedSelectionSortPanel
*/
public AnimatedSelectionSortPanel() {
addMouseListener(new MouseAdapter()
{
@Override
public void mouseClicked(MouseEvent e)
{
selectionSort();
repaint();
}
});
loadArray();
for(int i = 0; i < NUMBER_INDEXES; i++){
if(i%10==0){
System.out.println("");
System.out.print("" + number[i]+", ");
}else{
System.out.print("" + number[i]+", ");
}
}
}
@Override
public void paintComponent(Graphics g) {
super.paintComponent(g);
drawPass(g);
for (int i = 0; i < NUMBER_INDEXES; i++){
if(i%10==0){
System.out.println("");
System.out.print(""+ number[i]+ ", ");
}else{
System.out.print(""+ number[i]+ ", ");
}
}
}
private void loadArray() {
Random rnd = new Random();
for (int i = 0; i < NUMBER_INDEXES; i++) {
number[i] = rnd.nextInt((100 - 20) + 1) + 20;
}
}
public void drawPass(Graphics g) {
int xBasePosition = 10;
int yBasePosition = 100;
for (int i = 0; i < NUMBER_INDEXES; i++) {
g.drawLine(xBasePosition,yBasePosition+20, xBasePosition, yBasePosition - number[i]);
xBasePosition+=10;
}
}
public void selectionSort(){
for(int top = 0; top <= number.length - 2; top++){
int minIndex = top;
for (int i = top + 1; i <= number.length - 1; i++) {
if (number[i] < number[minIndex]) {
minIndex = i;
}
}swapElements(top,minIndex);
}
}
private void swapElements(int index1, int index2){
int tmp = number[index1];
number[index1] = number[index2];
number[index2] = tmp;
}
}
顺便说一句:如果目的是真正将其显示为动画排序过程,您将不得不重新考虑一些现有的结构。预先警告:在“swapElements”方法中的某处添加一些Thread.sleep
不足以。您必须将排序过程和绘制过程分离(即排序必须在自己的线程中进行),并且您必须能够显示排序过程的中间状态。
关于java - 通过鼠标单击进行选择排序对行进行排序,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/23283944/