/**
* 弹出定位行对话框
*/
private void showLocationLineDialog(){
//取得总行数
int totalLineCount = jTextArea1.getLineCount();
if(totalLineCount <= 1){
return ;
}
String title = "跳转至行：(1..."+totalLineCount+")";
String line = JOptionPane.showInputDialog(this,title);
if(line==null||"".equals(line.trim())){
return;
}
try {
int intLine = Integer.parseInt(line);
if(intLine > totalLineCount){
return;
}
//JTextArea起始行号是0，所以此处做减一处理
int selectionStart = jTextArea1.getLineStartOffset(intLine-1);
int selectionEnd = jTextArea1.getLineEndOffset(intLine-1);
//如果是不是最后一行，selectionEnd做减一处理，是为了使光标与选中行在同一行
if(intLine != totalLineCount){
selectionEnd--;
}
jTextArea1.requestFocus(); //获得焦点
jTextArea1.setSelectionStart(selectionStart);
jTextArea1.setSelectionEnd(selectionEnd);
} catch (Exception e) {
e.printStackTrace();
}
}