[skip ci] add constants.java (#3404)

Signed-off-by: Nzw <zw@milvus.io>
Co-authored-by: Nzw <zw@milvus.io>

tests/milvus-java-test/src/main/java/com/Constants.java

+package com;
+
+import java.nio.ByteBuffer;
+import java.util.List;
+import java.util.Map;
+
+public final class Constants {
+
+    public static final int dimension = 128;
+
+    public static final int n_list = 128;
+
+    public static final int nb = 8000;
+
+    public static final String indexType = "IVF_SQ8";
+
+    public static final String defaultIndexType = "FLAT";
+
+    public static final String defaultBinaryIndexType = "BIN_FLAT";
+
+    public static final String defaultBinaryMetricType = "JACCARD";
+
+    public static final String floatFieldName = "float_vector";
+
+    public static final String binaryFieldName = "binary_vector";
+
+    public static final String indexParam = Utils.setIndexParam(indexType, "L2", n_list);
+
+    public static final String binaryIndexParam = Utils.setIndexParam(defaultBinaryIndexType, defaultBinaryMetricType, n_list);
+
+    public static final List<List<Float>> vectors = Utils.genVectors(nb, dimension, true);
+
+    public static final List<ByteBuffer> vectorsBinary = Utils.genBinaryVectors(nb, dimension);
+
+    public static final List<Map<String,Object>> defaultEntities = Utils.genDefaultEntities(dimension, nb, vectors);
+
+    public static final List<Map<String,Object>> defaultBinaryEntities = Utils.genDefaultBinaryEntities(dimension, nb, vectorsBinary);
+}