如何在Java中换行
[英]How to line break in java
问题描述
I am using "\\n" as a line break in Thread but it's not working. 
我在线程中使用"\\n"作为换行符，但无法正常工作。 I went through a lot of SO answers which suggest using System.getProperty("line.separator"); 我经历了很多这样的答案，建议使用System.getProperty("line.separator"); but that also does not work for me.. 但这对我也不起作用。
public static void main(String args[]) {
final ReentrantLock lock1 = new ReentrantLock();
final ReentrantLock lock2 = new ReentrantLock();
Runnable try1_2 = getRunnable(lock1, "lock 1", lock2, "lock 2");
Runnable try2_1 = getRunnable(lock2, "lock 2", lock1, "lock 1");
new Thread(try1_2).start();
new Thread(try2_1).start();
}
private Runnable getRunnable(final ReentrantLock lock1, final String lock1Name, final ReentrantLock lock2, final String lock2Name) {
return new Runnable() {
@Override
public void run() {
try {
if (lock1.tryLock(1, TimeUnit.SECONDS)) {
System.out.println("1"+lock1Name + " acquired in thread " + Thread.currentThread().getName());
text_3.setText(text_3.getText() +"1"+lock1Name + " acquired in thread " + Thread.currentThread().getName());
if (lock2.tryLock(1, TimeUnit.SECONDS)) {
System.out.println("2"+lock2Name + " acquired in thread " + Thread.currentThread().getName());
text_3.setText(text_3.getText() + "\n"+"2"+lock2Name + " acquired in thread " + Thread.currentThread().getName());
Thread.sleep(2000);
} else {
System.out.println("3"+"Could not acquire "+lock2Name + " in thread " + Thread.currentThread().getName());
text_3.setText(text_3.getText() + "\n"+"3"+"Could not acquire "+lock2Name + " in thread " + Thread.currentThread().getName());
lock1.unlock();
System.out.println("4"+lock1Name + " released in thread " + Thread.currentThread());
text_3.setText(text_3.getText() + "\n"+"4"+lock1Name + " released in thread " + Thread.currentThread());
}
} else {
System.out.println("5"+"Could not acquire " + lock1Name + " in thread " + Thread.currentThread());
text_3.setText(text_3.getText() + "\n"+"5"+"Could not acquire " + lock1Name + " in thread " + Thread.currentThread());
}
} catch (InterruptedException e) {
} finally {
if (lock1.isHeldByCurrentThread()) lock1.unlock();
if (lock2.isHeldByCurrentThread()) lock2.unlock();
}
}
};
}
output is as follows: 输出如下：
1lock 2 acquired in thread thread-1 1lock 2 acquired in thread thread-0....
I would like it to be as follows: 我希望如下所示：
1lock 2 acquired in thread thread-1 1lock 2 acquired in thread thread-0....
2 个解决方案
解决方案1
3 已采纳 2015-06-23 11:35:19
Please use, System.getProperty("line.separator"); 请使用System.getProperty（“ line.separator”）; like this, 像这样，
String newLine = System.getProperty("line.separator");
//then insert newLine variable as this :
text_3.setText(text_3.getText() + newLine+ "2 " + lock2Name +
"acquired in thread " + Thread.currentThread().getName());
解决方案2
1 2015-06-23 11:31:38
您是否尝试将文本设置为"<html> this is <br> test</html>" ？
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