GWT JSNI 布尔值
这是我的代码：
package com.eggproject_hu.WPECommerceAdminSales.client;
import java.lang.Boolean;
import com.google.gwt.core.client.GWT;
import com.google.gwt.user.client.Window;
public class AblakVillogo
{
public static Boolean focusedWindow = true;
private static Boolean init = false;
public static void setFocused(Boolean focus)
{
focusedWindow = focus;
}
public static Boolean getFocused()
{
return focusedWindow;
}
public static void focusVizsgalat()
{
if(focusedWindow == true)
{
GWT.log("igen");
}
else
{
GWT.log("nem");
}
}
public static void init()
{
if(init == false)
{
_init();
}
}
private native static void _init() /*-{
$wnd.jQuery(document).ready(function()
{
$wnd.jQuery($wnd).focus(function()
{
@com.eggproject_hu.WPECommerceAdminSales.client.AblakVillogo::focusVizsgalat()(); @com.eggproject_hu.WPECommerceAdminSales.client.AblakVillogo::setFocused(Ljava/lang/Boolean;)(true);
$wnd.console.log("focus");
}).blur(function()
{
var ret = false;
@com.eggproject_hu.WPECommerceAdminSales.client.AblakVillogo::focusVizsgalat()();
@com.eggproject_hu.WPECommerceAdminSales.client.AblakVillogo::setFocused(Ljava/lang/Boolean;)(false);
$wnd.console.log("blur");
});
});
}-*/;
}
我在浏览器控制台中看到了这一点：
未捕获的异常：java.lang.IllegalArgumentException：调用参数：布尔类型的 JS 值，预期为 java.lang.Boolean
我已经在Chrome和Firefox中进行了测试。
问题是什么？
感谢您的帮助！
Here's my code:
package com.eggproject_hu.WPECommerceAdminSales.client;
import java.lang.Boolean;
import com.google.gwt.core.client.GWT;
import com.google.gwt.user.client.Window;
public class AblakVillogo
{
public static Boolean focusedWindow = true;
private static Boolean init = false;
public static void setFocused(Boolean focus)
{
focusedWindow = focus;
}
public static Boolean getFocused()
{
return focusedWindow;
}
public static void focusVizsgalat()
{
if(focusedWindow == true)
{
GWT.log("igen");
}
else
{
GWT.log("nem");
}
}
public static void init()
{
if(init == false)
{
_init();
}
}
private native static void _init() /*-{
$wnd.jQuery(document).ready(function()
{
$wnd.jQuery($wnd).focus(function()
{
@com.eggproject_hu.WPECommerceAdminSales.client.AblakVillogo::focusVizsgalat()(); @com.eggproject_hu.WPECommerceAdminSales.client.AblakVillogo::setFocused(Ljava/lang/Boolean;)(true);
$wnd.console.log("focus");
}).blur(function()
{
var ret = false;
@com.eggproject_hu.WPECommerceAdminSales.client.AblakVillogo::focusVizsgalat()();
@com.eggproject_hu.WPECommerceAdminSales.client.AblakVillogo::setFocused(Ljava/lang/Boolean;)(false);
$wnd.console.log("blur");
});
});
}-*/;
}
I see this in the browser console:
uncaught exception: java.lang.IllegalArgumentException: invoke arguments: JS value of type boolean, expected java.lang.Boolean
I've tested in Chrome and Firefox.
What is the problem?
Thanks for the help!
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评论（2）
您必须将布尔值声明为原始布尔值才能从 javascript 设置值
，并且不需要在调用中指定 L/java/lang/Boolean，而是指定 Z
You have to declare the Boolean as the primitive boolean to set the value from javascript
and you dont need to specifiy L/java/lang/Boolean in the call but Z instead
要么遵循 Daniel 的建议，但随后您必须更改方法以采用
boolean参数（即始终使用boolean），或者您可以显式强制转换/装箱您的JSNI 方法中 java.lang.Boolean 中的 boolean：...即使在您的情况下，因为该值是常量，我宁愿直接使用
Boolean常量TRUE和FALSE：话虽如此，我确实相信 Daniel 的建议最适合您。
Either follow Daniel's advice, but then you have to change your method to take a
booleanargument (i.e. usebooleanall the way through), or you can explicitly cast/box your boolean in a java.lang.Boolean in your JSNI method:…even though in your case, because the value is a constant, I'd rather directly use the
BooleanconstantsTRUEandFALSE:That being said, I do believe Daniel's advice is your best fit.