# HG changeset patch
# User jlaskey
# Date 1526303689 10800
#      Mon May 14 10:14:49 2018 -0300
# Node ID f9c5ceacb880c0e6ce12b9c6c9041627de61a238
# Parent  92560438d306e2a3084f1dce917d0f9af5796aa9
8200436: String::isBlank
Reviewed-by: sundar

diff --git a/src/java.base/share/classes/java/lang/String.java b/src/java.base/share/classes/java/lang/String.java
--- a/src/java.base/share/classes/java/lang/String.java
+++ b/src/java.base/share/classes/java/lang/String.java
@@ -2729,6 +2729,31 @@
     }
 
     /**
+     * Returns {@code true} if the string is empty or contains only
+     * {@link Character#isWhitespace(int) white space} codepoints,
+     * otherwise {@code false}.
+     *
+     * @return {@code true} if the string is empty or contains only
+     *         {@link Character#isWhitespace(int) white space} codepoints,
+     *         otherwise {@code false}
+     *
+     * @see Character#isWhitespace(int)
+     *
+     * @since 11
+     */
+    public boolean isBlank() {
+        return indexOfNonWhitespace() == length();
+    }
+
+    private int indexOfNonWhitespace() {
+        if (isLatin1()) {
+            return StringLatin1.indexOfNonWhitespace(value);
+        } else {
+            return StringUTF16.indexOfNonWhitespace(value) >> 1;
+        }
+    }
+
+    /**
      * This object (which is already a string!) is itself returned.
      *
      * @return  the string itself.