1.exceptionԴ?码查?鿴
2.javaä¸ å¼å¸¸ç±»Exception(String message, Throwable cause)
3.exceptionåerrorçåºå«
4.javaä¸å¸¸è§çå¼å¸¸ç±»
exceptionԴ??鿴
查看源码:链接如下:
androiddocs/src/trunk/core/java/android/content/BroadcastReceiver.java
public void sendFinished(IActivityManager am) {
synchronized (this) {
if (mFinished) {
throw new IllegalStateException("Broadcast already finished");
}
mFinished = true;
估计是重复调用finish方法去结束广播,第二次调用就会抛这个错,码查权限管理 源码你不能关闭两次。码查乒乓缓存fpga源码
javaä¸ å¼å¸¸ç±»Exception(String message,码查图片文字合成源码 Throwable cause)
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/
*** The throwable that caused this throwable to get thrown, or null if this
* throwable was not caused by another throwable, or if the causative
* throwable is unknown. If this field is equal to this throwable itself,
* it indicates that the cause of this throwable has not yet been
* initialized.
*
* @serial
* @since 1.4
*/
exceptionåerrorçåºå«
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2.Exception å Error ä½ç°äº Java å¹³å°è®¾è®¡è 对ä¸åå¼å¸¸æ åµçåç±»ãException æ¯ç¨åºæ£å¸¸è¿è¡ä¸ï¼å¯ä»¥é¢æçæå¤æ åµï¼å¯è½å¹¶ä¸åºè¯¥è¢«æè·ï¼è¿è¡ç¸åºå¤çã
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4.Exception åå为å¯æ£æ¥ï¼checkedï¼å¼å¸¸åä¸æ£æ¥ï¼uncheckedï¼å¼å¸¸ï¼å¯æ£æ¥å¼å¸¸å¨æºä»£ç éå¿ é¡»æ¾å¼å°è¿è¡æè·å¤çï¼è¿æ¯ç¼è¯ææ£æ¥çä¸é¨åãåé¢æä»ç»çä¸å¯æ¥ç Errorï¼æ¯ Throwable ä¸æ¯ Exceptionã
å¦ä½å¤çè¿äºå¼å¸¸ï¼
å¨ç°å®ç¼ç¨ä¸æ们ä¸è¬ä½¿ç¨ try-with-resources å multiple catchæ¥è¿è¡ä¸äºå¼å¸¸å¤ç(便å©çç¹æ§)ï¼å¨ç¼è¯æ¶æï¼ä¼èªå¨çæç¸åºçå¤çé»è¾ï¼æ¯å¦ï¼èªå¨æç §çº¦å®ä¿æ close é£äºæ©å±äº AutoCloseable æè Closeable ç对象ã
try-with-resources æ¯ä¸ç§å¤çCloseableå®ç°ç±»å ³éèµæºçä¸ç§åæ³ï¼ç®ååäºä¸ä¸ªä¾åå¯ä»¥åç°å ¶å®è¿å°±æ¯ä¸ä¸è¯æ³ï¼è¿ç§è¯æ³å¯ä»¥èªå¨ç¼è¯å¸®å¿ç¼è¯æåå ³éæµçæä½ï¼
public static void main(String[] args) {
try (BufferedReader br = new BufferedReader(new FileReader("a"));
BufferedWriter writer = new BufferedWriter(new FileWriter("a"))) {
// Try-with-resources
} catch (IOException e) { // Multiple catch
// Handle it
}
}
ç¼è¯åclass
public static void main(String[] args) { try {
BufferedReader br = new BufferedReader(new FileReader("a"));
Throwable var2 = null; try {
BufferedWriter writer = new BufferedWriter(new FileWriter("a"));
Object var4 = null; if (writer != null) { if (var4 != null) { try {
writer.close();
} catch (Throwable var) {
((Throwable)var4).addSuppressed(var);
}
} else {
writer.close();
}
}
} catch (Throwable var) {
var2 = var; throw var;
} finally { if (br != null) { if (var2 != null) { try {
br.close();
} catch (Throwable var) {
var2.addSuppressed(var);
}
} else {
br.close();
}
}
}
} catch (IOException var) {
}
}
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