java中進度條代碼 java項目進度表

java中如何編寫一個進度條代碼,需要顯示百分比

在java里面有JProgressBar 這個類,你查下文檔看看如何實現(xiàn),我也沒有使用過

專注于為中小企業(yè)提供成都做網(wǎng)站、網(wǎng)站建設(shè)服務(wù),電腦端+手機端+微信端的三站合一,更高效的管理,為中小企業(yè)東海免費做網(wǎng)站提供優(yōu)質(zhì)的服務(wù)。我們立足成都,凝聚了一批互聯(lián)網(wǎng)行業(yè)人才,有力地推動了上千多家企業(yè)的穩(wěn)健成長,幫助中小企業(yè)通過網(wǎng)站建設(shè)實現(xiàn)規(guī)模擴充和轉(zhuǎn)變。

用 java 怎么做進度條?

import java.awt.Canvas;

import java.awt.Color;

import java.awt.Graphics;

public class MyProgressBar extends Canvas {

private float scaleSize;

private float currentValue;

public MyProgressBar() {

this(100, 50);

}

public MyProgressBar(float scaleSize, float currentValue) {

this.scaleSize = scaleSize;

this.currentValue = currentValue;

this.setBackground(Color.lightGray);

this.setForeground(Color.magenta);

setSize(150, 25);

}

public float getCurrentValue() {

return currentValue;

}

public void setCurrentValue(float currentValue) {

this.currentValue = Math.max(0, currentValue);

if (this.scaleSize this.currentValue) {

this.currentValue = this.scaleSize;

}

}

public float getScaleSize() {

return scaleSize;

}

public void setScaleSize(float scaleSize) {

this.scaleSize = Math.max(1.0f, scaleSize);

if (this.scaleSize this.currentValue) {

this.scaleSize = this.currentValue;

}

}

public synchronized void paint(Graphics g) {

int w = getSize().width;

int h = getSize().height;

g.setColor(getBackground());

g.fillRect(1, 1, w - 2, h - 2);

g.fill3DRect(0, 0, w - 1, h - 1, true);

g.setColor(getForeground());

g.fillRect(3, 3, (int) (currentValue * (w - 6) / scaleSize), h - 6);

}

}

下面是程序執(zhí)行入口點:

import java.awt.FlowLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JButton;

import javax.swing.JFrame;

public class TestMyProgressBar extends JFrame implements Runnable,

ActionListener {

private MyProgressBar bar;

private JButton btnStart;

static TestMyProgressBar tmpb;

public TestMyProgressBar() {

setSize(400, 300);

setLocation(400, 400);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

setTitle("演示自定義進度條");

setLayout(new FlowLayout());

btnStart = new JButton("開始");

this.add(btnStart);

btnStart.addActionListener(this);

bar = new MyProgressBar();

setVisible(true);

}

public static void main(String[] args) {

tmpb = new TestMyProgressBar();

}

@Override

public void run() {

for (int i = 1; i = 20; i++) {

int x = i * 5;

bar.setCurrentValue(x);

if (x 0 x 100) {

btnStart.setEnabled(false);

}

if (x == 100) {

btnStart.setEnabled(true);

}

try {

Thread.sleep(200);

add(bar);

} catch (InterruptedException e) {

e.printStackTrace();

}

}

}

@Override

public void actionPerformed(ActionEvent e) {

if (e.getActionCommand().equals("開始")) {

Thread t = new Thread(tmpb);

t.start();

}

}

}

Java中如何實現(xiàn)進度條效果

import java.awt.Color; import java.awt.Toolkit; import javax.swing.ImageIcon; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JProgressBar; import javax.swing.JWindow; @SuppressWarnings("serial") public class Demo extends JWindow implements Runnable { // 定義加載窗口大小 public static final int LOAD_WIDTH = 455; public static final int LOAD_HEIGHT = 295; // 獲取屏幕窗口大小 public static final int WIDTH = Toolkit.getDefaultToolkit().getScreenSize().width; public static final int HEIGHT = Toolkit.getDefaultToolkit().getScreenSize().height; // 定義進度條組件 public JProgressBar progressbar; // 定義標簽組件 public JLabel label; // 構(gòu)造函數(shù) public Demo() { // 創(chuàng)建標簽,并在標簽上放置一張圖片 label = new JLabel(new ImageIcon("images/background.jpg")); label.setBounds(0, 0, LOAD_WIDTH, LOAD_HEIGHT - 15); // 創(chuàng)建進度條 progressbar = new JProgressBar(); // 顯示當前進度值信息 progressbar.setStringPainted(true); // 設(shè)置進度條邊框不顯示 progressbar.setBorderPainted(false); // 設(shè)置進度條的前景色 progressbar.setForeground(new Color(0, 210, 40)); // 設(shè)置進度條的背景色 progressbar.setBackground(new Color(188, 190, 194)); progressbar.setBounds(0, LOAD_HEIGHT - 15, LOAD_WIDTH, 15); // 添加組件 this.add(label); this.add(progressbar); // 設(shè)置布局為空 this.setLayout(null); // 設(shè)置窗口初始位置 this.setLocation((WIDTH - LOAD_WIDTH) / 2, (HEIGHT - LOAD_HEIGHT) / 2); // 設(shè)置窗口大小 this.setSize(LOAD_WIDTH, LOAD_HEIGHT); // 設(shè)置窗口顯示 this.setVisible(true); } public static void main(String[] args) { Demo t = new Demo(); new Thread(t).start(); } @Override public void run() { for (int i = 0; i 100; i++) { try { Thread.sleep(100); } catch (InterruptedException e) { e.printStackTrace(); } progressbar.setValue(i); } JOptionPane.showMessageDialog(this, "加載完成"); this.dispose(); } }

分享題目:java中進度條代碼 java項目進度表
文章網(wǎng)址:http://www.bm7419.com/article18/dohhpdp.html

成都網(wǎng)站建設(shè)公司_創(chuàng)新互聯(lián),為您提供營銷型網(wǎng)站建設(shè)、App設(shè)計、用戶體驗、動態(tài)網(wǎng)站、網(wǎng)站策劃網(wǎng)頁設(shè)計公司

廣告

聲明:本網(wǎng)站發(fā)布的內(nèi)容(圖片、視頻和文字)以用戶投稿、用戶轉(zhuǎn)載內(nèi)容為主,如果涉及侵權(quán)請盡快告知,我們將會在第一時間刪除。文章觀點不代表本網(wǎng)站立場,如需處理請聯(lián)系客服。電話:028-86922220;郵箱:631063699@qq.com。內(nèi)容未經(jīng)允許不得轉(zhuǎn)載,或轉(zhuǎn)載時需注明來源: 創(chuàng)新互聯(lián)

小程序開發(fā)