文件读写工具简单实现（四）--鼠标选择某行即显示某行内容

//添加插入符侦听器，以便侦听任何插入符的更改通知(读取光标行列数并将内容填充到需要的参数中)
textArea.addCaretListener(new CaretListener() {
public void caretUpdate(CaretEvent e) {
// TODO Auto-generated method stub
try {
//e.getDot() 获得插入符的位置
int offset = e.getDot() ;
int row = textArea.getLineOfOffset(offset);
int column = e.getDot() - textArea.getLineStartOffset(row);
// 状态栏中显示当前光标所在行号、所在列号
System.out.println("Line: " + (row + 1) + ", Column: " + (column+1));
String[] lineStrings = textArea.getText().split("\n");
System.out.println(lineStrings[row]);
int m = lineStrings[row].length();
String str1= lineStrings[row];
System.out.println(str1);
System.out.println(m);
ROM = row+1;//提供外部调用业务
sum = str1;//提供外部调用业务
if (m > 0) {
System.out.println("mmmm");
//大输入框鼠标指向某行，判断是否有GG字段，没有RF不会显示在上面
int q = str1.indexOf("GG");
if (q > 0) {
System.out.println(q);
String substrRF = str1.substring(q,q+3);
textField_RF.setText(substrRF);
String substrName = str1.substring(0,q-2);
textField_name.setText(substrName);
String substrNumber = str1.substring(q+4);
textField_number.setText(substrNumber);
}
} else {

}

} catch (Exception ex) {
ex.printStackTrace();
}

}

});