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POget objects back from collection
 

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  1. POget objects back from collection
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    <p>I am trying to modify a specific object which is returned as an Object collection from a method. Now lots of other objects are also added to this collection. Hence finding the specific object gets difficult. I tried to solve it using "instanceof", but am getting the following exception:</p> <pre><code>java.lang.ClassCastException: com.sheesoft.MockBean cannot be cast to com.sheesoft.TestBean at com.sheesoft.Main.main(Main.java:30) </code></pre> <p>I have been able to reproduce the same exception with some test classes. Please let me know where I am going wrong.</p> <p>Main:</p> <pre><code>package com.sheesoft; import java.util.ArrayList; import java.util.Collection; import java.util.Iterator; public class Main { /** * @param args */ public static void main(String[] args) { Collection&lt;Object&gt; beanCollection = new ArrayList&lt;Object&gt;(); TestBean tb1 = new TestBean(); MockBean mb1 = new MockBean(); beanCollection.add(tb1); beanCollection.add(mb1); try{ Iterator&lt;Object&gt; itr = beanCollection.iterator(); while(itr.hasNext()){ Object object = itr.next(); if(object instanceof TestBean){ TestBean tb2 = (TestBean) itr.next(); tb2 = modifyTestBody(tb2); System.out.println(tb2.getBody()); } if(object instanceof MockBean){ MockBean mb2 = (MockBean) itr.next(); System.out.println(mb2.getMockPayload()); } } }catch(Exception e){ e.printStackTrace(); } } private static TestBean modifyTestBody(TestBean tb) { tb.setBody("NewBody"); return tb; } } </code></pre> <p>Bean1:</p> <pre><code>package com.sheesoft; public class TestBean { private String header; private String body; public TestBean(){ setHeader("header"); setBody("body"); } public String getHeader(){ return header; } public String getBody(){ return body; } public void setHeader(String header){ this.header=header; } public void setBody(String body){ this.body = body; } public String toString(){ StringBuilder sb = new StringBuilder(); sb.append("header = "+header+"\n"); sb.append("body = "+body+"\n"); String returns = sb.toString(); return returns; } } </code></pre> <p>Bean 2:</p> <pre><code>package com.sheesoft; public class MockBean { private String mockHeader; private String mockBody; private String mockPayload; public MockBean(){ setMockHeader("mockHeader"); setMockBody("mockBody"); setMockPayload("mockPayload"); } public String getMockHeader(){ return mockHeader; } public String getMockBody(){ return mockBody; } public String getMockPayload(){ return mockPayload; } public void setMockHeader(String header){ this.mockHeader=header; } public void setMockBody(String body){ this.mockBody = body; } public void setMockPayload(String payload) { this.mockPayload = payload; } public String toString(){ StringBuilder sb = new StringBuilder(); sb.append("mockHeader = "+mockHeader+"\n"); sb.append("mockBody = "+mockBody+"\n"); sb.append("mockPayload"+mockPayload+"\n"); String returns = sb.toString(); return returns; } } </code></pre>
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    1. This table or related slice is empty.
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    1. USSrihari
    1. USSrihari
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
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    2. PO
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    3. PO
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
 

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