小编Sco*_*eld的帖子

列出您将需要的每个单独的包装(参见#1)或者从包装中导入所有内容(参见#2)会更好吗？

1

import java.awt.image.ColorModel;
import java.awt.image.ComponentColorModel;
import java.awt.image.ColorConvertOp;

2

import java.awt.*;

我希望我在这里做些傻事......

我正在尝试为a设置JPA注释Map<String, Phone>并获得以下堆栈跟踪.

Exception [EclipseLink-6069] (Eclipse Persistence Services - 2.4.1.v20121003-ad44345): org.eclipse.persistence.exceptions.QueryException
Exception Description: The field [EMPLOYEE.PHONE_TYPE] in this expression has an invalid table in this context.
Query: ReadAllQuery(name="phones" referenceClass=Phone )
    at org.eclipse.persistence.exceptions.QueryException.invalidTableForFieldInExpression(QueryException.java:739)
    at org.eclipse.persistence.internal.expressions.FieldExpression.validateNode(FieldExpression.java:281)
    at org.eclipse.persistence.expressions.Expression.normalize(Expression.java:3259)
    at org.eclipse.persistence.internal.expressions.DataExpression.normalize(DataExpression.java:369)
    at org.eclipse.persistence.internal.expressions.FieldExpression.normalize(FieldExpression.java:208)
    at org.eclipse.persistence.internal.expressions.SQLSelectStatement.normalize(SQLSelectStatement.java:1377)
    at org.eclipse.persistence.internal.queries.ExpressionQueryMechanism.buildNormalSelectStatement(ExpressionQueryMechanism.java:546)
    at org.eclipse.persistence.internal.queries.ExpressionQueryMechanism.prepareSelectAllRows(ExpressionQueryMechanism.java:1700)
    at org.eclipse.persistence.queries.ReadAllQuery.prepareSelectAllRows(ReadAllQuery.java:721)
    at org.eclipse.persistence.queries.ReadAllQuery.prepare(ReadAllQuery.java:657)
    at org.eclipse.persistence.queries.DatabaseQuery.checkPrepare(DatabaseQuery.java:614)
    at org.eclipse.persistence.queries.ObjectLevelReadQuery.checkPrepare(ObjectLevelReadQuery.java:883)
    at org.eclipse.persistence.queries.DatabaseQuery.checkPrepare(DatabaseQuery.java:575)
    at org.eclipse.persistence.queries.DatabaseQuery.execute(DatabaseQuery.java:820)
    at org.eclipse.persistence.queries.ObjectLevelReadQuery.execute(ObjectLevelReadQuery.java:1109)
    at org.eclipse.persistence.queries.ReadAllQuery.execute(ReadAllQuery.java:393)
    at org.eclipse.persistence.queries.ObjectLevelReadQuery.executeInUnitOfWork(ObjectLevelReadQuery.java:1197)
    at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.internalExecuteQuery(UnitOfWorkImpl.java:2875)
    at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1602)
    at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1584)
    at org.eclipse.persistence.internal.indirection.QueryBasedValueHolder.instantiate(QueryBasedValueHolder.java:112)
    at org.eclipse.persistence.internal.indirection.QueryBasedValueHolder.instantiate(QueryBasedValueHolder.java:99)
    at org.eclipse.persistence.internal.indirection.DatabaseValueHolder.getValue(DatabaseValueHolder.java:88)
    at org.eclipse.persistence.internal.indirection.UnitOfWorkValueHolder.instantiateImpl(UnitOfWorkValueHolder.java:161) …

我尝试在我的项目中使用可组合项GoogleMap，但现在我需要LatLngBounds可见的谷歌地图onMapLoaded，以便我能够在这个边界内加载一些 POI，但我找不到如何获取此信息的答案。

有人可以给我线索吗？

我有一条 3D 线存在于两个已知点之间：{X1, Y1, Z1} 和 {X2, Y2, Z2}。

(X1,Y1,X1)----------(X2,Y2,Z2)

这些点之间的直线上有一个点 (Xd,Yd,Zd)，距 (X1,Y1,Z1) 的距离为 D。

(X1,Y1,X1)---D---(Xd,Yd,Zd)-----(X2,Y2,Z2)

如何确定点(Xd,Yd,Zd)的坐标？