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How to use a Java variable with LIKE and '%' in sql?


How to use a Java variable with LIKE and '%' in sql?

By : Martin
Date : November 21 2020, 11:01 PM
With these it helps I want to load data into a jTable when user searches for some relevant details by entering name (a person can have a first name and a last name). I have used below query and it is not giving me results. Please tell me what's wrong here. , I am used to just concatenate the '%' in the parameter like this:
code :
PreparedStatement pst = conn.prepareStatement("SELECT first_name FROM  person_profile WHERE first_name LIKE ?");
...
pst.setString(1, StringUtils.defaultIfBlank(name, "") + "%");


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In Java, if a child class shadows a static parent variable with an instance child variable, which variable will inherite

In Java, if a child class shadows a static parent variable with an instance child variable, which variable will inherite


By : Wendy Suen
Date : March 29 2020, 07:55 AM
I wish this helpful for you From The Java Language Specification:
java framework source has a pattern that assigns instance variable to local variable

java framework source has a pattern that assigns instance variable to local variable


By : Andriuxa34
Date : March 29 2020, 07:55 AM
should help you out Though this is a really old question, but I want to share some information I earned during my journey.
I could find some explanation about my question on Performance Tips on Android page. First see sample code from the page,
code :
static class Foo {
    int mSplat;
}

Foo[] mArray = ...

public void zero() {
    int sum = 0;
    for (int i = 0; i < mArray.length; ++i) {
        sum += mArray[i].mSplat;
    }
}

public void one() {
    int sum = 0;
    Foo[] localArray = mArray;
    int len = localArray.length;

    for (int i = 0; i < len; ++i) {
        sum += localArray[i].mSplat;
    }
}

public void two() {
    int sum = 0;
    for (Foo a : mArray) {
        sum += a.mSplat;
    }
}
public void zero();
Code:
   0: iconst_0                          // Push int constant 0
   1: istore_1                          // Store into local variable 1 (sum=0)
   2: iconst_0                          // Push int constant 0
   3: istore_2                          // Store into local variable 2 (i=0)
   4: goto          22                  // First time through don't increment
   7: iload_1
   8: aload_0
   9: getfield      #14                 // Field mArray:[LTest$Foo;
  12: iload_2
  13: aaload
  14: getfield      #39                 // Field Test$Foo.mSplat:I
  17: iadd
  18: istore_1
  19: iinc          2, 1
  22: iload_2                           // Push value of local variable 2 (i)
  23: aload_0                           // Push local variable 0 (this)
  24: getfield      #14                 // Field mArray:[LTest$Foo;
  27: arraylength                       // Get length of array
  28: if_icmplt     7                   // Compare and loop if less than (i < mArray.length)
  31: return

public void one();
Code:
   0: iconst_0                          // Push int constant 0
   1: istore_1                          // Store into local variable 1 (sum=0)
   2: aload_0                           // Push this
   3: getfield      #14                 // Field mArray:[LTest$Foo;
   6: astore_2                          // Store reference into local variable (localArray)
   7: aload_2                           // Load reference from local variable
   8: arraylength                       // Get length of array
   9: istore_3                          // Store into local variable 3 (len = mArray.length)
  10: iconst_0                          // Push int constant 0
  11: istore        4                   // Store into local variable 4 (i=0)
  13: goto          29                  // First time through don't increment
  16: iload_1
  17: aload_2
  18: iload         4
  20: aaload
  21: getfield      #39                 // Field Test$Foo.mSplat:I
  24: iadd
  25: istore_1
  26: iinc          4, 1
  29: iload         4                   // Load i from local variable
  31: iload_3                           // Load len from local variable
  32: if_icmplt     16                  // // Compare and loop if less than (i < len)
  35: return
why variable defined in a class is not a local variable but instance variable in java?

why variable defined in a class is not a local variable but instance variable in java?


By : Matthew Smith
Date : March 29 2020, 07:55 AM
I think the issue was by ths following ,
In the below Class A isn't x a local variable too since it is in blocks({})
How can I insert a Variable from PHP into a Java Script Variable with a direct variable?

How can I insert a Variable from PHP into a Java Script Variable with a direct variable?


By : PatrickL
Date : March 29 2020, 07:55 AM
this will help How can I put a variable value from PHP $name, into a Java script variable, so I can insert it into this offline openDatabase for testing. , It's simple! Just do this way:
code :
<script>
    var x = <?php echo $msg; ?>;
</script>
Java : Why is changing a local variable affecting a global variable original copy?

Java : Why is changing a local variable affecting a global variable original copy?


By : shan jiyang
Date : March 29 2020, 07:55 AM
will be helpful for those in need Before local variable x is made,
code :
List<Message> x = new ArrayList<Message>();
//modify x here
List<String> a = new ArrayList<String>();
a.add("a");
a.add("b");
a.add("c");
List<String> b = new ArrayList<>(a);
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