[Chapter 25] 25.5 java.lang.Boolean (JDK 1.0)

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| Chapter 25 The java.lang Package |

## 25.5 java.lang.Boolean (JDK 1.0)

###

This class provides an immutable object wrapper around the `boolean` primitive type. Note that the `TRUE` and `FALSE` constants are `Boolean` objects; they are not the same as the `true` and `false` `boolean` values. In Java 1.1, this class defines a `Class` constant that represents the `boolean` type.

`booleanValue()` returns the `boolean` value of a `Boolean` object. The class method `getBoolean()` retrieves the `boolean` value of a named property from the system property list. The class method `valueOf()` parses a string and returns the `Boolean` value it represents.

    public final class Boolean extends Object implements Serializable {
        // Public Constructors
                public Boolean(boolean value);
                public Boolean(String s);
        // Constants
                public static final Boolean FALSE;
                public static final Boolean TRUE;
            1.1public static final Class TYPE;
        // Class Methods
                public static boolean getBoolean(String name);
                public static Boolean valueOf(String s);
        // Public Instance Methods
                public boolean booleanValue();
                public boolean equals(Object obj);  // Overrides Object
                public int hashCode();  // Overrides Object
                public String toString();  // Overrides Object
    }

### Returned By:

Boolean.valueOf()

### Type Of:

Boolean.FALSE, Boolean.TRUE

java.lang.ArrayStoreException (JDK 1.0) |  | java.lang.Byte (JDK 1.1)