Examples of java.lang.StringBuilder

java.lang.StringBuilder
A mutable sequence of characters. This class provides an API compatible with StringBuffer, but with no guarantee of synchronization. This class is designed for use as a drop-in replacement for StringBuffer in places where the string buffer was being used by a single thread (as is generally the case). Where possible, it is recommended that this class be used in preference to StringBuffer as it will be faster under most implementations.
The principal operations on a StringBuilder are the append and insert methods, which are overloaded so as to accept data of any type. Each effectively converts a given datum to a string and then appends or inserts the characters of that string to the string builder. The append method always adds these characters at the end of the builder; the insert method adds the characters at a specified point.
For example, if z refers to a string builder object whose current contents are "start", then the method call z.append("le") would cause the string builder to contain "startle", whereas z.insert(4, "le") would alter the string builder to contain "starlet".
In general, if sb refers to an instance of a StringBuilder, then sb.append(x) has the same effect as sb.insert(sb.length(), x). Every string builder has a capacity. As long as the length of the character sequence contained in the string builder does not exceed the capacity, it is not necessary to allocate a new internal buffer. If the internal buffer overflows, it is automatically made larger.
Instances of StringBuilder are not safe for use by multiple threads. If such synchronization is required then it is recommended that {@link java.lang.StringBuffer} be used. @author Michael McCloskey @version 1.11, 11/17/05 @see java.lang.StringBuffer @see java.lang.String @since 1.5

            return mCastType;
        }


        @Override
        public String toString() {
            StringBuilder sb = new StringBuilder();
            sb.append(mInputColumn);
            if (mCast) {
                sb.append(" cast to: " + DataType.findTypeName(mCastType));
            }
            return sb.toString();
        }

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    public boolean isRich(){
        return getIncome() >= 80000;
    }


    public String getName() {
        StringBuilder name = new StringBuilder();


        // Age
        if (getAge()>=21){
            name.append("old");
        }else{
            name.append("young");
        }


        //Income
        if (isRich()){
            name.append(" rich");
        }


        //Sex
        if (getSex() == Sex.MALE){
            name.append(" man");
        }else{
             name.append(" woman");
        }


        return name.toString();
    }

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        this.totalSplits = totalSplits;
    }


    @Override
    public String toString() {
        StringBuilder st = new StringBuilder();
        st.append("Number of splits :" + wrappedSplits.length+"\n");
        try {
            st.append("Total Length = "+ getLength()+"\n");
            for (int i = 0; i < wrappedSplits.length; i++) {
                st.append("Input split["+i+"]:\n   Length = "+ wrappedSplits[i].getLength()+"\n  Locations:\n");
                for (String location :  wrappedSplits[i].getLocations())
                    st.append("    "+location+"\n");
                st.append("\n-----------------------\n"); 
          }
        } catch (IOException e) {
          return null;
        } catch (InterruptedException e) {
          return null;
        }
        return st.toString();
    }

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  @Override
  public String get(int index)
  {
    index = index * width;
    StringBuilder sb = new StringBuilder();
    sb.append(_elements[index]);


    int left = width;
    ++index;
    while (left>1)
    {
      sb.append(',');
      sb.append(_elements[index]);
      --left; ++index;
    }


    return sb.toString();
  }

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    long[] val = (long[])o;


    if (val.length == 0)
      return null;


    StringBuilder sb = new StringBuilder();
    sb.append(val[0]);


    for(int i=1; i<val.length; ++i)
    {
      sb.append(',');
      sb.append(val[i]);
    }
    return sb.toString();
  }

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        // Get the response
        BufferedReader rd = new BufferedReader
                (new InputStreamReader(response.getEntity().getContent()));


        StringBuilder builder = new StringBuilder();
        String line = "";
        while ((line = rd.readLine()) != null) {
            builder.append(line);
        }


        Assert.assertNotNull(response);
        Assert.assertEquals("Got " + builder.toString(), 200, response.getStatusLine().getStatusCode());
    }

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        // Get the response
        BufferedReader rd = new BufferedReader
                (new InputStreamReader(response.getEntity().getContent()));


        StringBuilder builder = new StringBuilder();
        String line = "";
        while ((line = rd.readLine()) != null) {
            builder.append(line);
        }


        Assert.assertNotNull(response);
        Assert.assertEquals("Got " + builder.toString(), 200, response.getStatusLine().getStatusCode());
    }

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        this.totalSplits = totalSplits;
    }


    @Override
    public String toString() {
        StringBuilder st = new StringBuilder();
        st.append("Number of splits :" + wrappedSplits.length+"\n");
        try {
            st.append("Total Length = "+ getLength()+"\n");
            for (int i = 0; i < wrappedSplits.length; i++) {
                st.append("Input split["+i+"]:\n   Length = "+ wrappedSplits[i].getLength()+"\n  Locations:\n");
                for (String location :  wrappedSplits[i].getLocations())
                    st.append("    "+location+"\n");
                st.append("\n-----------------------\n"); 
          }
        } catch (IOException e) {
          return null;
        } catch (InterruptedException e) {
          return null;
        }
        return st.toString();
    }

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        this.workingDirPrefix = new String(workingDirPrefix);
    }


    private String makeConfigFileForJavaGrader(MultipartRequest req, File workingDir)
    {
        StringBuilder configString = new StringBuilder();
        //key setting value
        String JUnitTestClassName = req.getParameter("JUnitTestClassName");
        if(null != JUnitTestClassName)
        {
            configString.append("[" + JUnitTestClassName + "]\n");
        }
        else
        {
            System.out.println("There is no JUnitTestClassName provided");
        }


        Enumeration keys = req.getParameterNames();
        while(keys.hasMoreElements())
        {
            String key = (String)keys.nextElement();
            String value = req.getParameter(key);


            if(null != value)
            {
                if(true == value.equalsIgnoreCase("on"))
                    value = "Yes";


                configString.append(key + " = " +  value + "\n");
            }


        }


        // input files to process
        Enumeration files = req.getFileNames(); 
        while (files.hasMoreElements()) 
        { 
            String name = (String)files.nextElement(); 
            String filename = req.getFilesystemName(name); 
            //String type = req.getContentType(name); 
            if(null != filename)
                configString.append(name + " = " + workingDir.getAbsolutePath() + File.separator + filename + "\n");
        } 


        //output directory
        File outputDir = new File(workingDir.getAbsolutePath() + File.separator + "output");
        outputDir.mkdirs();
        configString.append("outputDirectory = " + outputDir.getAbsolutePath() + "\n");
        
        //timeout
        configString.append("testProcessTimeOut = 15\n");


        //Feedback directory
        File feedbackDir = new File(workingDir.getAbsolutePath() + File.separator + "FeedBack");
        feedbackDir.mkdirs();


        return configString.toString();
    }

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        String header =  "email\n{\n" + 
                         " Date receives : " + this.received.toString() + "\n" +
                         " From: " + this.from + "\n" +
                         " Subject: " + this.subject + "\n" +
                         " Body:" + this.body + "\n";
        StringBuilder result = new StringBuilder();
        result.append(header);
        for(Attachment a : this.attachments)
        {
            result.append(" " + a.toString());
        }
        
        result.append("}\n");
        
        return result.toString();
    }

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