java.lang.StringBuilder.ensureCapacity(int minCap) method throws OutOfMemoryError Exception with the minCap value near to the Integer.MIN_VALUE.

See the following simple code:

public class TestEnsureCapacity {

    public static void main(String[] args) {
        StringBuilder sb = new StringBuffer("abc");
        int cap = sb.capacity();
        sb.ensureCapacity(Integer.MIN_VALUE);
    }

}

The Exception message will be thrown:

Exception in thread "main" java.lang.OutOfMemoryError
        at java.lang.AbstractStringBuilder.expandCapacity(AbstractStringBuilder.java:125)
        at java.lang.AbstractStringBuilder.ensureCapacityInternal(AbstractStringBuilder.java:112)
        at java.lang.AbstractStringBuilder.ensureCapacity(AbstractStringBuilder.java:103)
        at java.lang.StringBuilder.ensureCapacity(StringBuilder.java:72)
        at TestEnsureCapacity.main(TestEnsureCapacity.java:6)

In that time JDK specification say nothing about possible exceptions for the java.lang.StringBuilder.ensureCapacity method: If the minimumCapacity argument is nonpositive, this method takes no action and simply returns.

This is regression since JDK 7 b94.