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The || operator or conditional OR operator operates on two boolean expressions. This operator exhibit “short-circuiting” behavior, which means that the second operand is evaluated only if needed. The || operator evaluate only boolean values. For an OR (||) expression it will return true if either of the operand is true. If the first operand […]
The ! operator is a logical compliment operator. The operator inverts the value of a boolean expression. package org.kodejava.basic; public class NegationOperator { public static void main(String[] args) { // negate the result of boolean expressions boolean negate = !(2 < 3); boolean value = !false; System.out.println("result: " + negate); System.out.println("value : " + value); […]
To wrap the lines of JTextArea we need to call the setLineWrap(boolean wrap) method and pass a true boolean value as the parameter. The setWrapStyleWord(boolean word) method wrap the lines at word boundaries when we set it to true. package org.kodejava.swing; import javax.swing.*; import java.awt.*; public class TextAreaWrapDemo extends JPanel { public TextAreaWrapDemo() { initializeUI(); […]
Finding the next subsequence of the input sequence that matches the pattern while ignoring the case of the string in regular expression can simply apply by create a pattern using compile(String regex, int flags) method and specifies a second argument with PATTERN.CASE_INSENSITIVE constant. package org.kodejava.regex; import java.util.regex.Pattern; import java.util.regex.Matcher; public class RegexIgnoreCaseDemo { public static […]
To set the font and color of JTextArea we can use the setFont() and setForeground() methods of the JTextArea. To create a font we must define the font name, the font style and its size. For the colors we can uses the constant color values defined by the Color class. package org.kodejava.swing; import javax.swing.*; import […]
The following example shows you how to set the property of the JTextArea so that it cannot be edited or modified. To make the JTextArea not editable call the setEditable() method and pass a false value as the parameter. package org.kodejava.swing; import javax.swing.*; import java.awt.*; public class TextAreaNotEditable extends JPanel { public TextAreaNotEditable() { initializeUI(); […]
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