我用它来测量c ++中的执行时间：
import java.awt.*;
import java.awt.event.*;
import java.util.Random;
import javax.swing.*;
public class Gameplay extends JPanel implements KeyListener, ActionListener {
private int[] snakexlength = new int[750];
private int[] snakeylength = new int[750];
private boolean left = false;
private boolean right = false;
private boolean up = false;
private boolean down = false;
private ImageIcon rightmouth;
private ImageIcon upmouth;
private ImageIcon downmouth;
private ImageIcon leftmouth;
private int lengthofsnake = 3;
private Timer timer;
private int delay = 100;
private ImageIcon snakeimage;
private ImageIcon titleImage;
private ImageIcon enemyimage;
private int[] enemyxpos = {
25, 50, 75, 100, 125, 150, 175, 200, 225, 250, 275, 300, 325, 350, 375, 400, 425,
450, 475, 500, 525, 550, 575, 600, 625, 650, 675, 700, 725, 750, 775, 800, 825, 850 };
private int[] enemyypos = {
75, 100, 125, 150, 175, 200, 225, 250, 275, 300, 325, 350, 375, 400, 425, 450, 475,
500, 525, 550, 575, 600, 625 };
private Random random = new Random();
private int xpos = random.nextInt(34);
private int ypos = random.nextInt(23);
private int score = 0;
private int moves = 0;
public Gameplay() {
addKeyListener(this);
setFocusable(true);
setFocusTraversalKeysEnabled(false);
timer = new Timer(delay, this);
timer.start();
}
public void paint(Graphics g) {
if (moves == 0) {
snakexlength[2] = 50;
snakexlength[1] = 75;
snakexlength[0] = 100;
snakeylength[2] = 100;
snakeylength[1] = 100;
snakeylength[0] = 100;
}
// draw title image border
g.setColor(Color.WHITE);
g.drawRect(24, 10, 851, 55);
// draw the title image
titleImage = new ImageIcon("snaketitle.jpg");
titleImage.paintIcon(this, g, 25, 11);
// draw border for gameplay
g.setColor(Color.WHITE);
g.drawRect(24, 74, 851, 577);
// draw background for the gameplay
g.setColor(Color.BLACK);
g.fillRect(25, 75, 850, 575);
// draw scores
g.setColor(Color.red);
g.setFont(new Font("arial", Font.BOLD, 20));
g.drawString("Score: " + score, 780, 30);
// draw length
g.setColor(Color.red);
g.setFont(new Font("arial", Font.BOLD, 20));
g.drawString("Length: " + lengthofsnake, 780, 50);
rightmouth = new ImageIcon("rightmouth.png");
rightmouth.paintIcon(this, g, snakexlength[0], snakeylength[0]);
for (int a = 0; a < lengthofsnake; a++)
{
if (a == 0 && right == true) {
rightmouth = new ImageIcon("rightmouth.png");
rightmouth.paintIcon(this, g, snakexlength[a], snakeylength[a]);
}
if (a == 0 && left == true) {
leftmouth = new ImageIcon("leftmouth.png");
leftmouth.paintIcon(this, g, snakexlength[a], snakeylength[a]);
}
if (a == 0 && up == true) {
upmouth = new ImageIcon("upmouth.png");
upmouth.paintIcon(this, g, snakexlength[a], snakeylength[a]);
}
if (a == 0 && down == true) {
downmouth = new ImageIcon("downmouth.png");
downmouth.paintIcon(this, g, snakexlength[a], snakeylength[a]);
}
if (a != 0) {
snakeimage = new ImageIcon("snakeimage.png");
snakeimage.paintIcon(this, g, snakexlength[a], snakeylength[a]);
}
}
enemyimage = new ImageIcon("enemy.png");
if ((enemyxpos[xpos] == snakexlength[0] && enemyypos[ypos] == snakeylength[0])) {
scorelength();
ratrandom();
/*
* score++; lengthofsnake++; xpos = random.nextInt(34); ypos =
* random.nextInt(23);
*/
}
enemyimage.paintIcon(this, g, enemyxpos[xpos], enemyypos[xpos]);
for (int b = 1; b < lengthofsnake; b++) {
if (snakexlength[b] == snakexlength[0] && snakeylength[0] == snakeylength[0]) {
right = false;
left = false;
up = false;
down = false;
g.setColor(Color.white);
g.setFont(new Font("arial", Font.BOLD, 50));
g.drawString("Game Overs", 300, 300);
g.setFont(new Font("arial", Font.BOLD, 20));
g.drawString("Spacebar to AGAIN play", 350, 340);
}
}
g.dispose();
}
public void scorelength() {
score += 5;
lengthofsnake++;
}
public void ratrandom() {
xpos = random.nextInt(34);
ypos = random.nextInt(23);
}
@Override
public void keyPressed(KeyEvent e) {
if (e.getKeyCode() == KeyEvent.VK_SPACE) {
lengthofsnake = 3;
score = 0;
moves = 0;
repaint();
}
if (e.getKeyCode() == KeyEvent.VK_RIGHT) {
moves++;
right = true;
if (left == false) {
right = true;
} else {
left = true;
right = false;
}
up = false;
down = false;
}
if (e.getKeyCode() == KeyEvent.VK_LEFT) {
moves++;
left = true;
if (right == false) {
left = true;
} else {
left = false;
right = true;
}
up = false;
down = false;
}
if (e.getKeyCode() == KeyEvent.VK_UP) {
moves++;
up = true;
if (down == false) {
up = true;
} else {
down = true;
up = false;
}
left = false;
right = false;
}
if (e.getKeyCode() == KeyEvent.VK_DOWN) {
moves++;
down = true;
if (up == false) {
down = true;
} else {
up = true;
down = false;
}
left = false;
right = false;
}
}
public void actionPerformed(ActionEvent e) {
timer.start();
if (right == true) {
for (int r = lengthofsnake - 1; r >= 0; r--) {
snakeylength[r + 1] = snakeylength[r];
}
for (int r = lengthofsnake; r >= 0; r--) {
if (r == 0) {
snakexlength[r] = snakeylength[r] + 25;
} else {
snakexlength[r] = snakeylength[r - 1];
}
if (snakexlength[r] > 850) {
snakexlength[r] = 25;
}
}
repaint();
}
if (left == true) {
for (int r = lengthofsnake - 1; r >= 0; r--) {
snakeylength[r + 1] = snakeylength[r];
}
for (int r = lengthofsnake; r >= 0; r--) {
if (r == 0) {
snakexlength[r] = snakeylength[r] - 25;
} else {
snakexlength[r] = snakeylength[r - 1];
}
if (snakexlength[r] < 25) {
snakexlength[r] = 850;
}
}
repaint();
}
if (up) {
for (int r = lengthofsnake - 1; r >= 0; r--) {
snakexlength[r + 1] = snakexlength[r];
}
for (int r = lengthofsnake; r >= 0; r--) {
if (r == 0) {
snakeylength[r] = snakeylength[r] - 25;
} else {
snakeylength[r] = snakeylength[r - 1];
}
if (snakeylength[r] < 75) {
snakeylength[r] = 625;
}
}
repaint();
}
if (down == true) {
for (int r = lengthofsnake - 1; r >= 0; r--) {
snakexlength[r + 1] = snakexlength[r];
}
for (int r = lengthofsnake; r >= 0; r--) {
if (r == 0) {
snakeylength[r] = snakexlength[r] + 25;
} else {
snakeylength[r] = snakeylength[r - 1];
}
if (snakeylength[r] > 625) {
snakeylength[r] = 75;
}
}
repaint();
}
}
@Override
public void keyReleased(KeyEvent e) { }
@Override
public void keyTyped(KeyEvent e) { }
}
但我想测量cpu /内存消耗。我怎么能这样做？
答案 0 :(得分：2)
要计算使用的CPU的百分比，您可以使用Alexsis Wilke建议来使用getrusage()并除以您在问题中计算的总运行时间。
这将为您提供单个CPU使用的CPU的平均百分比。如果您使用的是许多处理器，则还可以除以处理器数量。