如何在Java Swing中将文本文件读入jtextarea [英] How to read a text file into jtextarea in Java Swing

问题描述

这是我的代码：

try {
    String textLine;
    FileReader fr = new FileReader("ad.txt");
    BufferedReader reader = new BufferedReader(fr);
    while((textLine=reader.readLine()) != null) {
        textLine = reader.readLine();
        jTextArea1.read(reader, "jTextArea1");
    }
}
catch (IOException ioe) {
    System.err.println(ioe);
    System.exit(1);
}

我的.txt文件包含以下内容：

And my .txt file contains the following:

contig00001长度= 586个numreads = 4
CGGGAAATTATCcGCGCCTTCACCGCCGCCGGTTCCACCGACGAACGGATACTGCGtGaa
ggCCGCGATCCCGTCggaCGGAAAaCGCCcTGGCCCGGGAaCATACCGTTCGGGCCGCCA
AGTGTTATAGCCGGACCACTTGTCAGAACATTTCCaaTCCGAAGATGTGAGTtCGGAAGg
TAAAAGCCCGACAAGTTGCGCGgTGAATTTACCTTtACcGCACGATATGCGTCCGTATTA
AaGAAAaGTTCGAAATTATCAGTAAGGCCGACCTGAAaGCTGACCGGGAGTTCAACAAAA
TCTGCATCACCcGGgTCACGGTCGAAATTGCTGTACGCGGCGCTGAACGTAAATTCACCC
TTTcTAAGGGTGTCGCcGTCGTAAACCGTAAaCAaGCCGGTAGCGCCGCCCATCGGGCCG
CCGGTACCAACCGTCGGTGCCGTGTTTCTtGCATCATTGTCCGATCGAGCGTTCTCGTCC
GCTTGTGCAAaTCCTGCAaTAGCTAACGTGAAAACGATCAGAGCTGTTGTAAATACTCTA
TAAGCGAGATTCATCACATTCCTCcGCCGAAATAAAAAGTTAATTt

contig00001 length=586 numreads=4 CGGGAAATTATCcGCGCCTTCACCGCCGCCGGTTCCACCGACGAACGGATACTGCGtGaa ggCCGCGATCCCGTCggaCGGAAAaCGCCcTGGCCCGGGAaCATACCGTTCGGGCCGCCA AGTGTTATAGCCGGACCACTTGTCAGAACATTTCCaaTCCGAAGATGTGAGTtCGGAAGg TAAAAGCCCGACAAGTTGCGCGgTGAATTTACCTTtACcGCACGATATGCGTCCGTATTA AaGAAAaGTTCGAAATTATCAGTAAGGCCGACCTGAAaGCTGACCGGGAGTTCAACAAAA TCTGCATCACCcGGgTCACGGTCGAAATTGCTGTACGCGGCGCTGAACGTAAATTCACCC TTTcTAAGGGTGTCGCcGTCGTAAACCGTAAaCAaGCCGGTAGCGCCGCCCATCGGGCCG CCGGTACCAACCGTCGGTGCCGTGTTTCTtGCATCATTGTCCGATCGAGCGTTCTCGTCC GCTTGTGCAAaTCCTGCAaTAGCTAACGTGAAAACGATCAGAGCTGTTGTAAATACTCTA TAAGCGAGATTCATCACATTCCTCcGCCGAAATAAAAAGTTAATTt

contig00002长度= 554个numreads = 4
TGCGCCAaCCGCGCTCTtCATAAaTGGGCACTGCTCCCGATGGCCgACTCGGGCGGTTCG
CCATGAGATCTTTGCCtACCcAGgAaCtCACcACCAAGTCTGA TTGCTGTGTGTTTtCTT
CAAGTCCCTATTTCTATTCtCTTtAATGGAACCCGTAGGAAACCCGTGTAGGACGCGGGA
aCCGCACTTgAAGGGGGAGGCGCGGGGTACCGGtCCGGGAACGTACGGGTACCGGCGGGG
gAGGGGAGGGGGACCgCTCCGGGAAGGCCAGGGGACGGATTGGGGAAGGgCGGGTACCGA
AGCGGGgAAaTGGGggAaCcGGCGAGAGGGTTCCTCGCTAAGTGGGGGAAATaGGGGAAA
GGTTGACCAGTGGTtCCCcGCTCTCGTAACATGCCTCAGATAGCGCCATCCGCTGTACCT
GGtcaggtcGctggcaacttcggccgagcaggtgaacccgaaaggtgagggtcagtgtga
cacaccaaccgaacaccgacgaggcaagcgtaggagccggcgtggccgcgcccggcggcg
ctgaggactcctcg

contig00002 length=554 numreads=4 TGCGCCAaCCGCGCTCTtCATAAaTGGGCACTGCTCCCGATGGCCgACTCGGGCGGTTCG CCATGAGATCTTTGCCtACCcAGgAaCtCACcACCAAGTCTGATTGCTGTGTGTTTtCTT CAAGTCCCTATTTCTATTCtCTTtAATGGAACCCGTAGGAAACCCGTGTAGGACGCGGGA aCCGCACTTgAAGGGGGAGGCGCGGGGTACCGGtCCGGGAACGTACGGGTACCGGCGGGG gAGGGGAGGGGGACCgCTCCGGGAAGGCCAGGGGACGGATTGGGGAAGGgCGGGTACCGA AGCGGGgAAaTGGGggAaCcGGCGAGAGGGTTCCTCGCTAAGTGGGGGAAATaGGGGAAA GGTTGACCAGTGGTtCCCcGCTCTCGTAACATGCCTCAGATAGCGCCATCCGCTGTACCT GGtcaggtcGctggcaacttcggccgagcaggtgaacccgaaaggtgagggtcagtgtga cacaccaaccgaacaccgacgaggcaagcgtaggagccggcgtggccgcgcccggcggcg ctgaggactcctcg

但是跳过前两行显示输出。

But shows the output by skipping the first two lines.

这是什么原因？

推荐答案

您不需要while循环或readLine方法。只需致电 jtextArea1.read（读者，jTextArea1）

You don't need the while loop, or the readLine method. Just call jtextArea1.read(reader, "jTextArea1")

修改：更新关注你的评论。如果你想跳过以>开头的所有行，你需要手动读取文件然后将每行附加到textArea。

Edit: update following your comment. If you want to skip all lines starting with >, you will need to read the file manually and then append each line to your textArea.

所以类似：

String line;
while ((line = reader.readLine()) != null)
{
    if (!line.startsWith(">"))
    {
        jTextArea.append(line + "\n");
    }
}

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