数组索引存储在新数组

我需要梳理阵列项目和旧索引存储在新的数组，所以我有尝试treemap和收集的是，我得到了在收集完整的输出按我的预期，但问题加薪，当我转换集合阵列。数组索引存储在新数组

float[] array = new float[10]; 
     array[0] = 11; 
     array[1] = 10; 
     array[2] = 3; 
     array[3] = 40; 
     array[4] = 5; 
     array[5] = 60; 
     array[6] = 4; 
     array[7] = 41; 
     array[8] = 110; 
     array[9] = 8;   

     Map<Float, Integer> map = new TreeMap<Float, Integer>(); 
     for (int i = 0; i < array.length; ++i) { 
      map.put(array[i], i); 
     } 
     Collection<Integer> indices = map.values(); 
     System.out.println("indices"+indices); 
     String s[] = (String[])indices.toArray(new String[0]); 
     for (int i = 0, n = s.length; i < n; i++) 
     { 
       System.out.println(s[i]); 
     }

它引发错误，如：

04-18 14:55:13.380: ERROR/AndroidRuntime(859): FATAL EXCEPTION: main 
04-18 14:55:13.380: ERROR/AndroidRuntime(859): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.jcord/com.jcord.Jcord_for_Con_lat_long_to_east_nothenActivity}: java.lang.ArrayStoreException 
04-18 14:55:13.380: ERROR/AndroidRuntime(859):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663) 
04-18 14:55:13.380: ERROR/AndroidRuntime(859):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) 
04-18 14:55:13.380: ERROR/AndroidRuntime(859):  at android.app.ActivityThread.access$2300(ActivityThread.java:125) 
04-18 14:55:13.380: ERROR/AndroidRuntime(859):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) 
04-18 14:55:13.380: ERROR/AndroidRuntime(859):  at android.os.Handler.dispatchMessage(Handler.java:99) 
04-18 14:55:13.380: ERROR/AndroidRuntime(859):  at android.os.Looper.loop(Looper.java:123) 
04-18 14:55:13.380: ERROR/AndroidRuntime(859):  at android.app.ActivityThread.main(ActivityThread.java:4627) 
04-18 14:55:13.380: ERROR/AndroidRuntime(859):  at java.lang.reflect.Method.invokeNative(Native Method) 
04-18 14:55:13.380: ERROR/AndroidRuntime(859):  at java.lang.reflect.Method.invoke(Method.java:521) 
04-18 14:55:13.380: ERROR/AndroidRuntime(859):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
04-18 14:55:13.380: ERROR/AndroidRuntime(859):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
04-18 14:55:13.380: ERROR/AndroidRuntime(859):  at dalvik.system.NativeStart.main(Native Method) 
04-18 14:55:13.380: ERROR/AndroidRuntime(859): Caused by: java.lang.ArrayStoreException 
04-18 14:55:13.380: ERROR/AndroidRuntime(859):  at java.util.AbstractCollection.toArray(AbstractCollection.java:357) 
04-18 14:55:13.380: ERROR/AndroidRuntime(859):  at com.jcord.Jcord_for_Con_lat_long_to_east_nothenActivity.onCreate(Jcord_for_Con_lat_long_to_east_nothenActivity.java:50) 
04-18 14:55:13.380: ERROR/AndroidRuntime(859):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
04-18 14:55:13.380: ERROR/AndroidRuntime(859):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 
04-18 14:55:13.380: ERROR/AndroidRuntime(859):  ... 11 more

来源

2012-04-26 user1343673

更换

String s[] = (String[])indices.toArray(new String[0]);

与

Integer s[] = (Integer[])indices.toArray(new Integer[0]);

来源

2012-04-26 10:41:48

完美........... – user1343673 2012-04-26 10:42:32

读这是理解g为什么你需要这样做。 http://docs.oracle.com/javase/7/docs/api/java/lang/ArrayStoreException.html – 2012-04-26 10:44:55

数组索引存储在新数组

回答

相关问题