public TestBuildObject build() { TestBuildObject obj = new TestBuildObject(this.id, this.name, this.address); return obj; public int getId() { return id; public String getName() { return name; public String getAddress() { return address; @Override public String toString() { return "TestBuildObject [id=" + id + ", name=" + name + ", address=" + address + "]"; //测试示例 package testBuildObj; public class TestBuildObjMain { public static void main(String[] args) { TestBuildObject obj = TestBuildObject.newBuilder().id(12).name("Tom").address("Pandora").build(); System.out.println(obj); TestBuildObject obj2 = TestBuildObject.newBuilder().name("Jerry").build(); System.out.println(obj2);