如何在java程序中加上滾動(dòng)條，為什么我的程序滾動(dòng)條沒(méi)顯示？

請(qǐng)使用JScroolPane。比如要為一個(gè)多行文本域加上滾動(dòng)條，要使用如下代碼：

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jf.add(new?JScrollPane(new?TextArea(50,30))));

其中jf代表窗口。

java解析lrc文件代碼

lrc可以通過(guò)如下util工具類進(jìn)行轉(zhuǎn)換，如果想知道結(jié)果是否讀取的有問(wèn)題，可以直接用記事本打開lrc文件的，之后和輸出結(jié)果比對(duì)一下就行。

package com.routon.utils;

import java.io.BufferedReader;

import java.io.FileInputStream;

import java.io.IOException;

import java.io.InputStreamReader;

import java.util.ArrayList;

import java.util.List;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

import android.util.Log;

/**

* parse lrc file tool

* eg：

* utilLrc lrc = new utilLrc("/sdcard/test.lrc");

* get song name : String title = lrc.getTitle();

* get performer name : String artist = lrc.getArtist();

* get album name: String album = lrc.getAlbum();

* get lrcmaker name: String lrcMaker = lrc.getLrcMaker();

* get song list: ListStatement list = lrc.getLrcList();

*

* @author xuweilin

*

*/

public class utilLrc {

private static String TAG = "utilLrc";

public class Statement {

private double time = 0.0; //time, 0.01s

private String lyric = ""; //song word

/*

* get time

*/

public double getTime() {

return time;

}

/*

* set time

*/

public void setTime(double time) {

this.time = time;

}

/*

* set time.format:mm:ss.ms

*/

public void setTime(String time) {

String str[] = time.split(":|\\.");

this.time = Integer.parseInt(str[0])*60+Integer.parseInt(str[1])+Integer.parseInt(str[2])*0.01;

}

/*

* get lrc word

*/

public String getLyric() {

return lyric;

}

/*

* set lrc word

*/

public void setLyric(String lyric) {

this.lyric = lyric;

}

}

private BufferedReader bufferReader = null;

private String title = "";

private String artist = "";

private String album = "";

private String lrcMaker = "";

private ListStatement statements = new ArrayListStatement();

/*

*

* fileName

*/

public utilLrc(String fileName) throws IOException{

FileInputStream file = new FileInputStream(fileName);

bufferReader = new BufferedReader(new InputStreamReader(file, "utf-8"));

readData();

}

/*

* read the file

*/

private void readData() throws IOException{

statements.clear();

String strLine;

while(null != (strLine = bufferReader.readLine()))

{

if("".equals(strLine.trim()))

{

continue;

}

if(null == title || "".equals(title.trim()))

{

Pattern pattern = Pattern.compile("\\[ti:(.+?)\\]");

Matcher matcher = pattern.matcher(strLine);

if(matcher.find())

{

title=matcher.group(1);

continue;

}

}

if(null == artist || "".equals(artist.trim()))

{

Pattern pattern = Pattern.compile("\\[ar:(.+?)\\]");

Matcher matcher = pattern.matcher(strLine);

if(matcher.find())

{

artist=matcher.group(1);

continue;

}

}

if(null == album || "".equals(album.trim()))

{

Pattern pattern = Pattern.compile("\\[al:(.+?)\\]");

Matcher matcher = pattern.matcher(strLine);

if(matcher.find())

{

album=matcher.group(1);

continue;

}

}

if(null == lrcMaker || "".equals(lrcMaker.trim()))

{

Pattern pattern = Pattern.compile("\\[by:(.+?)\\]");

Matcher matcher = pattern.matcher(strLine);

if(matcher.find())

{

lrcMaker=matcher.group(1);

continue;

}

}

int timeNum=0;

String str[] = strLine.split("\\]");

for(int i=0; istr.length; ++i)

{

String str2[] = str[i].split("\\[");

str[i] = str2[str2.length-1];

if(isTime(str[i])){

++timeNum;

}

}

for(int i=0; itimeNum;++i)

{

Statement sm = new Statement();

sm.setTime(str[i]);

if(timeNumstr.length)

{

sm.setLyric(str[str.length-1]);

}

statements.add(sm);

}

}

sortLyric();

}

/*

* judge the string is or not date format.

*/

private boolean isTime(String string)

{

String str[] = string.split(":|\\.");

if(3!=str.length)

{

return false;

}

try{

for(int i=0;istr.length;++i)

{

Integer.parseInt(str[i]);

}

}

catch(NumberFormatException e)

{

Log.e(TAG, "isTime exception："+e.getMessage());

return false;

}

return true;

}

/*

* sort the word by time.

*/

private void sortLyric()

{

for(int i=0;istatements.size()-1;++i)

{

int index=i;

double delta=Double.MAX_VALUE;

boolean moveFlag = false;

for(int j=i+1;jstatements.size();++j)

{

double sub;

if(0=(sub=statements.get(i).getTime()-statements.get(j).getTime()))

{

continue;

}

moveFlag=true;

if(subdelta)

{

delta=sub;

index=j+1;

}

}

if(moveFlag)

{

statements.add(index, statements.get(i));

statements.remove(i);

--i;

}

}

}

/**

* get title

* @return

*/

public String getTitle(){

return title;

}

/**

* get artist

* @return

*/

public String getArtist(){

return artist;

}

/**

* get album

* @return

*/

public String getAlbum(){

return album;

}

/**

* get lrc maker

* @return

*/

public String getLrcMaker(){

return lrcMaker;

}

/**

* get song list

* @return

*/

public ListStatement getLrcList(){

return statements;

}

}

如何在java中實(shí)現(xiàn) 歌詞同步顯示

如果你打開歌詞文件查看的話,前面都會(huì)有時(shí)間.我想歌詞同步也是靠的這個(gè)時(shí)間吧

求教，急用！JAVA按歌詞文件的時(shí)間標(biāo)簽從小到大排列內(nèi)容，然后最好能給我做個(gè)方法，讓我直接調(diào)用，排

你好，這是你要的方法，直接輸入路徑調(diào)用就可以了，輸出結(jié)果是sorted-加原文件名

/**

*?根據(jù)路徑和編碼?重新排列歌詞中的文件，轉(zhuǎn)換后的文件是“sorted-原文件”

*

*?@param?source?原文件

*/

public?static?void?sortLyric(String?source)?{

try?{

BufferedReader?br?=?new?BufferedReader(new?InputStreamReader(new?FileInputStream(source),?"UTF-8"));

ListString?lines?=?new?ArrayListString();

String?line;

while?((line?=?br.readLine())?!=?null)?{

lines.add(line);

}

br.close();

Collections.sort(lines);

BufferedWriter?bw?=?new?BufferedWriter(new?OutputStreamWriter(new?FileOutputStream("sorted-"?+?source,?false),?"UTF-8"));

for?(String?everyLine?:?lines)?{

bw.write(everyLine);

bw.newLine();

bw.flush();

}

bw.close();

}?catch?(Exception?e)?{

e.printStackTrace();

}

}

java實(shí)現(xiàn)文字循環(huán)上下滾動(dòng)并逐漸放大或縮小

是用java Applet 么？

我試著寫了個(gè)，估計(jì)代碼不是很簡(jiǎn)， 你看看是不是這種效果：坐標(biāo)自己可以去調(diào)整下，名字從上到下移動(dòng)，從上到中間的時(shí)候變大，過(guò)了中間逐漸變小，過(guò)了底部顯示下一個(gè)名字，循環(huán)顯示，題意應(yīng)該沒(méi)理解錯(cuò)吧

import java.applet.*;

import java.awt.*;

public class ShowName extends Applet

{

String names[]=new String[]{"luojian","qianhongcheng","fenglingxin","luoxiaojian","wangyin"};

int size=20;

int index =0;

int offsetY=20;

int size1 =size;

int size2 =size-10;

int size3 =size-20;

int name1Y =0+offsetY;

int name2Y =-40+offsetY;

int name3Y =-80+offsetY;

int name1Index =index;

int name2Index =index+1;

int name3Index =index+2;

public void init()

{

resize(400,400);

setVisible(true);

}

public void paint(Graphics g)

{

try

{

checkName("name1Index",name1Y);

checkName("name2Index",name2Y);

checkName("name3Index",name3Y);

String name1 =names[name1Index];

String name2 =names[name2Index];

String name3 =names[name3Index];

name1Y=checkY(name1Y);

name2Y=checkY(name2Y);

name3Y=checkY(name3Y);

size1=checkSize(name1Y,size1);

size2=checkSize(name2Y,size2);

size3=checkSize(name3Y,size3);

Font font1 = new Font(null,Font.PLAIN,size1);

Font font2 = new Font(null,Font.PLAIN,size2);

Font font3 = new Font(null,Font.PLAIN,size3);

g.setFont(font1);

g.drawString(name1, 100, name1Y);

g.setFont(font2);

g.drawString(name2, 100, name2Y);

g.setFont(font3);

g.drawString(name3, 100, name3Y);

Thread.sleep(300);

}

catch(Exception e)

{

e.printStackTrace();

}

repaint();

}

public int checkSize(int p,int psize)

{

if(p200)

psize =psize+10;

if(p200)

psize =psize-10;

if(p=400)

psize =size-20;

return psize;

}

public int checkY(int p)

{

if(p=400)

p=-80;

else

p=p+40;

return p;

}

public void checkName(String nameindex,int p)

{

if(p=400)

{

if(nameindex.equals("name1Index"))

{

if(name1Index4)

name1Index++;

else

name1Index =index;

}

if(nameindex.equals("name2Index"))

{

if(name2Index4)

name2Index++;

else

name2Index =index;

}

if(nameindex.equals("name3Index"))

{

if(name3Index4)

name3Index++;

else

name3Index =index;

}

}

}

}

滾動(dòng)的小球 java源代碼

;

要制造那種效果只需要大約 30 行 Java 代碼：

import javax.swing.*;

import java.awt.*;

import java.awt.geom.*;

class RollingBall extends JPanel {

Ellipse2D.Float ball = new Ellipse2D.Float( -100, 100, 50, 50 );

public void paintComponent( Graphics g ) {

super.paintComponent( g );

Graphics2D g2 = ( Graphics2D ) g;

// Draw the ball

g2.fill( ball );

// Draw the rotating ellipse by skewing the Device Space

double angdeg =?????// One rotation per ball's travelling over its perimeter

ball.x++ % ( Math.PI * ball.width ) / ( Math.PI * ball.width ) * 360;

g2.rotate( Math.toRadians( angdeg ), ball.getCenterX( ), ball.getCenterY( ) );

g2.scale( .5, 1 );

g2.translate( ball.getCenterX( ), 0 );

g2.setColor( Color.gray );

g2.fill( ball );

}

public void roll( ) throws Exception {

while( true ) {

repaint( );

Thread.sleep( 8 );

}

}

public static void main( String[ ] args ) throws Exception {

JFrame f = new JFrame( );

RollingBall rb = new RollingBall( );

f.setSize( 999, 185 );

f.getContentPane( ).add( rb );

f.setVisible( true );

rb.roll( );

}

}

分享題目：歌詞滾動(dòng)代碼java,音樂(lè)歌詞滾動(dòng)
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